{"id":313983,"date":"2023-02-28T14:59:00","date_gmt":"2023-02-28T07:59:00","guid":{"rendered":"https:\/\/quipperhome.wpcomstaging.com\/?p=313983"},"modified":"2023-03-01T15:45:42","modified_gmt":"2023-03-01T08:45:42","slug":"refleksi-matematika","status":"publish","type":"post","link":"https:\/\/quipperhome.wpcomstaging.com\/mapel\/matematika\/refleksi-matematika\/","title":{"rendered":"Pengertian Refleksi Matematika, Sifat, Jenis dan Contoh Soal"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1380\" height=\"947\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/flat-lay-school-supplies-assortment_23-2148913522.webp\" alt=\"\" class=\"wp-image-313987\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/flat-lay-school-supplies-assortment_23-2148913522.webp 1380w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/flat-lay-school-supplies-assortment_23-2148913522-768x527.webp 768w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/flat-lay-school-supplies-assortment_23-2148913522-1200x823.webp 1200w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2023\/03\/flat-lay-school-supplies-assortment_23-2148913522-1170x803.webp 1170w\" sizes=\"(max-width: 1380px) 100vw, 1380px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Hayo, siapa di antara Quipperian yang hobi bercermin? Cermin merupakan peralatan yang bisa membantu kamu untuk melihat wajah hingga bentuk tubuh yang lainnya. Hal itu karena bayangan yang dihasilkan oleh cermin akan sama persis dengan objeknya. Namun, posisinya berlawanan. Misalnya, tangan kananmu akan menjadi tangan kiri bayanganmu pada cermin. Di dalam Matematika, proses pencerminan semacam ini biasa disebut sebagai refleksi. Lalu, apa itu refleksi? Daripada penasaran, yuk simak selengkapnya!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Pengertian Refleksi Matematika<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Refleksi Matematika adalah perpindahan setiap titik atau objek ke titik lain atau objek lain seperti halnya pembentukan bayangan pada cermin datar. Jarak antara titik asal ke cermin pasti akan sama dengan jarak titik bayangan ke cermin. Refleksi tidak mengubah bentuk dan ukuran objek. Hanya saja, posisi titik awal terhadap titik bayangannya akan saling berlawanan. Jika titik awalnya di bawah, maka titik bayangannya di atas. Jika titik awalnya di kiri, titik bayangannya di kanan. Ya prinsipnya sama seperti posisi bayangan di cermin, <em>sih<\/em>. Apakah Quipperian penasaran? Silahkan bercermin, lalu perhatikan posisi bayangan terhadap dirimu ya.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Refleksi biasa dinyatakan sebagai <em>M<\/em>. Misalnya, titik P (<em>x<\/em>, <em>y<\/em>) mengalami refleksi hingga dihasilkan bayangan P\u2019(x\u2019, y\u2019). Secara matematis, bisa dinyatakan sebagai:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/rsMapj-iKuvL2zsTmZtrrCLSON42X2MSJDUU3At7FAuQZ3xZ0A_ts_GmNDqQ4_vl3sty_qliRy8OGeQYMAocN5UBtT0uYBnwmAMEL2crXNJUTqkkl_XIDuhrIk30HyupyTFZjXTvFYUREF2EvjhwYQ\" alt=\"\" width=\"156\" height=\"25\"\/><\/figure>\n\n\n\n<div class=\"baca\">\n<p><span class=\"head_baca\">Baca Juga: <\/span> <a href=\"https:\/\/www.quipper.com\/id\/blog\/mapel\/matematika\/dilatasi-matematika\/\">Rumus dan Jenis-Jenis Dilatasi Matematika serta Contoh Soal<\/a><\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Sifat-Sifat Refleksi Matematika<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Suatu transformasi atau perpindahan dikatakan refleksi jika memenuhi sifat-sifat tertentu, yakni sebagai berikut.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Jarak titik awal ke cermin akan sama dengan jarak bayangan ke cermin.<\/li>\n\n\n\n<li>Garis penghubung antara titik asal ke titik bayangan akan tegak lurus cermin.<\/li>\n\n\n\n<li>Semua garis penghubung antara titik asal dan titik bayangan akan saling sejajar. Artinya,&nbsp; tidak akan pernah berpotongan di suatu titik manapun.<\/li>\n\n\n\n<li>Pusat refleksi merupakan dianalogikan sebagai cermin.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Jenis-Jenis Refleksi Matematika<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Berdasarkan pusat refleksinya atau sumbu cerminnya, refleksi dibagi menjadi tujuh, yaitu refleksi terhadap sumbu-x, refleksi terhadap sumbu-y, refleksi terhadap titik pusat (0, 0), refleksi terhadap garis <em>y<\/em> = <em>x<\/em>, refleksi terhadap garis <em>y<\/em> = &#8211;<em>x<\/em>, refleksi terhadap garis <em>x<\/em> = <em>h<\/em>, dan refleksi terhadap garis <em>y<\/em> = <em>k<\/em>. Bagaimana pembahasan ketujuh refleksi tersebut?<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Refleksi Terhadap Sumbu-x<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pada refleksi jenis ini, sumbu-x berperan sebagai cermin atau pusat refleksinya. Jika titik P(x, y) direfleksikan terhadap sumbu-x, akan dihasilkan bayangan P\u2019(x\u2019, y\u2019). Secara matematis bisa dinyatakan sebagai:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/59R89VgCoTT3c7uJzUPiCZjUhcp1M3n9YxpEjb-7inq25hc5rXl2KbNXklvto15P59F1-om7WUmLBivXftEVvHyn0udIc5Vsas3_ikdRTCQSR4HOF0hOiiM4gRJ8e4QZIp4P-AMQYe7IYfW6KKQuCw\" alt=\"\" width=\"176\" height=\"29\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">x&#8217; = x<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">y\u2019 = -y<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">sehingga:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/nkNwGiSEnQMfTAnFOqPp2IF_U6zBFSEmYBflSKfN3qefO1z_iEgRMmG7BjDejF48dES2QnPLUK23-qSpjyjIgOb1Bgp1hLQMI75MW0kcbJQAjQ84nwJNjp40FMdkCCFSdhpezcvlqErpR0Bt6oHYvA\" alt=\"\" width=\"182\" height=\"29\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Koordinat titik bayangannya bisa kamu tentukan dengan konversi matriks berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/BfWZP1Oqse7mG9iu30XaVOHAHtLQGSV2IjuerSDVy1TdWnrtbc4vcb7JqyUD9qEtLQ3-Iba0lRJbXDBNQlDfFSQziPuPYQ21FH5IEcaCUtWjpiFQVOv9A6eslzYKILW7dRDq5T5JHHp0Fbg0igytGg\" alt=\"\" width=\"161\" height=\"111\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Contoh, titik P (2, 3) direfleksikan terhadap sumbu-x. Tentukan gambar bayangan terhadap titik awalnya.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jika titik P direfleksikan terhadap sumbu-x, akan dihasilkan bayangan P\u2019(2, -3). Gambar pencerminan kedua titik pada koordinat Cartesius adalah:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/q5otEeV2pid1TGOCw3nBEfexoPeCPVQRLq4-ViUaRBde0gM_ImEYssF70kGobtS8O7oeth1iz2kt-5GQPaLBIEi2suGVO_GlQcKr_0ZpcAdD2QbV0JrhdI-9mOJFMECtmC_jgB7nP2ytkAvrC5QsNw\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Gambar di atas menunjukkan bahwa jarak titik P terhadap sumbu-x sama dengan jarak titik P\u2019 ke sumbu-x.<\/p>\n\n\n\n<div class=\"baca\">\n<p><span class=\"head_baca\">Baca Juga: <\/span> <a href=\"https:\/\/www.quipper.com\/id\/blog\/mapel\/matematika\/permutasi-dan-kombinasi\/\">Kuasai Materi Permutasi dan Kombinasi dengan Conrtoh Soalnya<\/a><\/p>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Refleksi Terhadap Sumbu-y<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pada refleksi jenis ini, sumbu-y berperan sebagai cermin. Jarak titik awal ke sumbu-y pasti akan sama dengan jarak titik bayangan ke sumbu-y. Misalnya, titik P (x, y) direfleksikan terhadap sumbu-y, maka akan dihasilkan titik P\u2019. Koordinat P\u2019 bisa dinyatakan sebagai:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/tVPfHu1tnN-5DC4BfLsAoQGK_8lEyVsnWZwBZcY79MZ6ZsVF9LMwGBmPAM5OSFwqMx-Zs4D19mt5L0h-pNAaB8FWJfVX3Mwg5vd_EcWY_Z64L1fRqa1Nz28xnlrN6driJ2lBugdvkK4US22-3fW5-g\" alt=\"\" width=\"198\" height=\"33\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">x&#8217; = -x<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">y\u2019 = y<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">sehingga:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/i4LuaIfejyimY64XZMT-vLIPHA6ZyI3p1q9Ul40WqShvEr2pShRocoPGix3abVevMZXLa49rjP745ct7FmkmS2R3wzQHVCJRw6fY7NYzPnFV5d-tP2mi_ERWMfhYwD2oAWKKwX7aIs1r_0hO73wMrg\" alt=\"\" width=\"162\" height=\"27\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/EOrrXnx8wTOGOfJAHuQqB331Ngq2UPLVjZsOECLvo0RC9cC-4tFw2eCgP2VpWorNUtjLmomIR0oUU7NTwHtdmxMTrGRr721d9YilXogXWdu595POGtRXnMs_I9tvlbACw9s_uWY9ayVDZZbx9FEzkg\" alt=\"\" width=\"159\" height=\"109\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Agar lebih jelas, perhatikan contoh:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Titik P (2, 3) direfleksikan terhadap sumbu-y. Tentukan gambar bayangan terhadap titik awalnya.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jika titik P direfleksikan terhadap sumbu-y, akan dihasilkan bayangan P\u2019(-2, 3). Gambar pencerminan kedua titik pada koordinat Cartesius adalah:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/p9obvbBaUDXdukJaTifHwGzw-GvBadIP-ii4LE0u5Cr6YopWpr41FsyxM_o0KaGHG9Cr7_w8ThJFKozbFr8MPIdbwguzIxAE2lEz3yRvAUf1xtfISqY5ABIRNXhzvCHx4JAbUywepQQvGqCXcNiobQ\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dari gambar di atas, terbukti kan jika jarak antara titik P ke sumbu-y sama dengan jarak titik P\u2019 ke sumbu-y?<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Refleksi Terhadap Titik Pusat (0, 0)<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sama seperti dua refleksi sebelumnya, pada refleksi ini titik pusat (0, 0) berperan sebagai cermin. Artinya, jarak antara titik pusat ke titik awalnya akan sama dengan jarak titik bayangan ke titik pusat. Apabila titik P (x, y) direfleksikan terhadap titik (0, 0) akan dihasilkan bayangan P\u2019 seperti persamaan di bawah ini.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/hG5DztiovFv7obKuWU42Ab5cI6hxcLerXCTwkKAHL1b1ds5EuhVfutdkHE7Aq6r4nDA2qZsgqhYSosu3wqxV7V38-XDF26FppnScPnReY-tSzIkugM9dSYVN-02cjzW0iJs0BGiKxhLLQUfIz5Ex7A\" alt=\"\" width=\"209\" height=\"34\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">x&#8217; = -x<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">y\u2019 = -y<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">sehingga:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/B3vQtZCcctANDtq6JVOcoP1rfya5xyUHZvhTFu0Bb8ONQWnojlg4WPMh-sojdPoQVdWIW28j86xP5WcldjjI0yd5Px9YNmzT0JmtSCoyK14wTQmzWFSdatK1YzBePb-BxvnsyZvvdq9RSMQpDRVnyw\" alt=\"\" width=\"213\" height=\"33\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Persamaan matriksnya adalah:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/YBhNP7cxRfjAF6-_mqJRjLzz4IiMCdA3JFdoYs7Zv90oxQi1HWtF68D1Q5dg1a2iuwpXPr6umnJYAIRwcXwfYXMgI25FEFukXl7xIK7HBxGWXxlK8Z46r9PXF044ItyxgGITikTjmar2BEzibUx3Uw\" alt=\"\" width=\"181\" height=\"116\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Contoh:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Titik P (2, 3) direfleksikan terhadap titik (0, 0). Tentukan gambar bayangan terhadap titik awalnya.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Saat direfleksikan terhadap titik (0, 0), akan dihasilkan titik bayangan P\u2019 (-2, -3). Adapun gambar pencerminannya adalah sebagai berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/N1OAOY1rKXNwM5_BWycQ2nvrD9XOceATBiHCzXhl4aloVv7Ek_CgDC44zfgxsQYRIwapDQ0Pe6uhWCtj935OtFgZZbZ9Y6ZjmePfaD9dXxTUxZ8fz-ce9vjlUrp-WsL7onmg7C7xgBTdoOg98cgeig\" alt=\"\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Refleksi Terhadap Garis <\/strong><strong><em>y<\/em><\/strong><strong> = <\/strong><strong><em>x<\/em><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pada refleksi ini, garis <em>y<\/em> = <em>x<\/em> berperan sebagai pusat rotasi atau cermin. Itu artinya, jarak antara titik ke garis <em>y<\/em> = <em>x<\/em> sama jarak antara bayangan ke garis <em>y<\/em> = <em>x<\/em>. Misalnya, titik P yang berkoordinat (x, y) direfleksikan terhadap garis y = x. Refleksi itu akan menghasilkan bayangan P\u2019 seperti persamaan di bawah ini.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/pka_t8ouKAmVyZo47KGNYG6qSXtD6EbvPIiSY1ETh29QIfRn2qoTBhLTcdxrF2Bh6sSR0w5ZSWA_4LBXNLWrd_4n67ULR9D5M1eslJu0gFc57a9V-pyXPo4IATKGl_uJB1ezXlvgn9BTlXD73D2iKg\" alt=\"\" width=\"180\" height=\"28\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">x&#8217; = y<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">y\u2019 = x<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">sehingga:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/h_-hD3MlyQ0KJDDuSC7F6IzWLCD5rxZNPmCYYi4zm7Q3srskvmNCHgN9jGkH45kkaUY6zS-p4jeyRB-DzdM7DGDzjZRQm72vmuR3KlPr60v-q_IAVuQFNpobY9HG4prIhE4R24up_DHKfrrAKx_gBw\" alt=\"\" width=\"161\" height=\"27\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Persamaan matriksnya adalah:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/LuB9ALeb398-BaXmZTr0fp8QtvRHwL8VDuodD7FuLVWfhNiI6NUaXWE6wgwfcofiSC3DCQiFwnFaRNu8_6FW_FpebVOpeYfqe5e9OYUbUDsTbztdhJ0iA7tYyWD-gt_8i0ktn_x5VirGxrqGaB_8rg\" alt=\"\" width=\"133\" height=\"95\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Contoh:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Titik P (2, 3) direfleksikan terhadap garis y = x. Tentukan gambar bayangan terhadap titik awalnya.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Saat direfleksikan terhadap garis y = x, akan dihasilkan titik bayangan P\u2019 (3, 2). Adapun gambar pencerminannya adalah sebagai berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/edxMvU2JQ-7jOgVEH3aW16J0e9WjRetdO6OGufPDBzM7nOfDfyb6CbaYAr3rvPiIpdfY2Yj5MHrVNNuH7Eo6ITOv1TJuZ6ceRPF-B-R1sgvbPCD2AWFs_8heA-IGeJRNCGbb48KObAImQIV_7Wm3RQ\" alt=\"\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Refleksi Terhadap Garis <\/strong><strong><em>y<\/em><\/strong><strong> = &#8211;<\/strong><strong><em>x<\/em><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pada refleksi ini, garis <em>y<\/em> = &#8211;<em>x<\/em> berperan sebagai cermin atau pusat refleksi. Bentuk pencerminan terhadap garis y = -x hampir sama dengan pencerminan terhadap garis y = x. Hanya saja, posisi garisnya berlawanan.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/lHsTgz7Vv_ZGRfCNiQtmc0fJfFAEtyG7eJLzB1sTsyYzu-7szpmmRRAJ2jL-nP7skbO1J56SKV2WFBDdeuux-vTVWKonIV9Z3rOuugcuKxHr3Vl05Z-1B20a7ilNeKjFPqU88uZN10ErTutMrOTESg\" alt=\"\" width=\"201\" height=\"31\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">x&#8217; = -y<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">y\u2019 = -x<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">sehingga:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/wO8ByZH5sU1YH1-tZiOSkroBJDKl7Xm8h9BQGugBH5aj5v3l7T9N59zjDuRBQbF7g2hf4Um7IThyISRAWU4WD4v06dAVQOLRWNcTv8uW69ggJsXU6Fguo9roQ4vxd8gFUinjdW7mevuU1MwPr7bb8w\" alt=\"\" width=\"184\" height=\"28\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Persamaan matriksnya adalah:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/7-yXgNnksYDAM8Xg1d8WjEZm_1D1XVZR8NNGBFLmjOilIXIbB944_ZxKN_obB7kQ5ZIyi2V_09wMJoejclS5jU3s66EgE_z2uufCITAm9ICZ5YIbaGpXsSUOyiTESsWvxC5IfPD7uFNJUyyDT2wf2A\" alt=\"\" width=\"165\" height=\"106\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Untuk titik P (2, 3) yang direfleksikan terhadap garis y = -x, akan diperoleh hasil seperti berikut.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Saat direfleksikan terhadap garis y = -x, akan dihasilkan titik bayangan P\u2019 (-3, -2). Adapun gambar pencerminannya adalah sebagai berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/knHUMHbdMChHq_HnXhClZCSqVhr_4Zm684zKz5KdIPPtJ5pjE9fHqynoOgI89vNWfDcZk9OpYzp-dOZ3v2mbSjaZB9qNIeyoCXOsFJh4Isr6qdD1tSYMSF4xbtXcbgi087QuNrgwshJl6yrTDGACSQ\" alt=\"\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Refleksi Terhadap Garis <\/strong><strong><em>x = h<\/em><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Garis <em>x<\/em> = <em>h<\/em> merupakan garis yang sejajar dengan sumbu-y. Jika titik P direfleksikan terhadap garis <em>x<\/em> = <em>h<\/em>, artinya titik P dicerminkan terhadap garis <em>x<\/em> = <em>h<\/em> yang sejajar dengan sumbu-y. Secara matematis, bisa dinyatakan sebagai berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/pGEabxUzTnsPojwk9_1y9jXVp44wAsDiN2CEEra3OqkAz2RMoWL-dqCHFX-cLuoartyzABmAfu_ogYPc8EF3StlkjuyaXW_onxU3nIFz_XnLA73oI16rnKp0HtXHgcNqYVY3wpLvFrp2VuZ_1aZi6A\" alt=\"\" width=\"202\" height=\"31\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">x&#8217; = 2<em>h<\/em> &#8211; <em>x<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">y\u2019 = <em>y<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">sehingga:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/8rvLobhGONIfZgiEYWHzpjPy21aqDMm8CS1LdtxFWh3B29xiJjOxjuWwqzBXiWT2PjQ_KEg4H-lg3s27uU95XbNA5qgEjb3KjR9vROvgsZHvaiVXl6fJznb_64mW2Kl7QgEEVZpSa6AGEvxoQ5S0LQ\" alt=\"\" width=\"221\" height=\"28\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Persamaan matriksnya adalah:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/fNnbd1fJKrfBzcLwA0irjWM5BSHxv5umxWtCyBHnZyjjpyAhmSm-C3R-j-0pSeXajuDo-GWXebTNJ3_ee7ee8u5HrRvWFJaYPge0tVuthsn2sd2-wINR31F67AT3kEPVAxQENZivnIfTasbyFjfC0A\" alt=\"\" width=\"192\" height=\"105\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Lalu, bagaimana penerapan pada soalnya?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Titik P (2, 3) direfleksikan terhadap garis x = 3. Tentukan gambar bayangan terhadap titik awalnya.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Saat direfleksikan terhadap garis x = 3, akan dihasilkan titik bayangan P\u2019 seperti berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/b0oEotDZrcqfwrZjf274mcxYDgh6enkD3BE2CaizUBQ0x6kEJk8lHSE5-CZphVpnTL9u0eeD5j34WmMW2GCvMl9VvMcGpsaXElrJ-u2mhEDNJvfidsqehq5rXO0u2N5Io9iJHRaDaZXLcACOhw3C0w\" alt=\"\" width=\"168\" height=\"189\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jika titik itu kamu plot pada koordinat Cartesius, diperoleh:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/fpp_xJra0D98namjKaCW7Iq29vsp_eCRQTHkoPAVuqFBTYaxTwB0-q-Mho0bA2hv7vZg3lRpOdrrB6H_KYWAbXdO_5cmZ1Pnpdk6XV_Pm-Z8buXFWq4j-qsMSEOUnrahFHHJVMGCgs8OumdU2sZ-GA\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dari gambar di atas, terlihat bahwa garis <em>x<\/em> = 3 sejajar dengan sumbu-y.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Refleksi Terhadap Garis <\/strong><strong><em>y = k<\/em><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Garis <em>y<\/em> = <em>k <\/em>&nbsp;merupakan garis yang sejajar sumbu-x. Proses pembentukan bayangannya juga sama dengan pembentukan bayangan terhadap sumbu-x. Jika titik P direfleksikan terhadap garis <em>x<\/em> = <em>k<\/em>, artinya titik P dicerminkan terhadap garis <em>x<\/em> = <em>k<\/em> yang sejajar dengan sumbu-x. Secara matematis, bisa dinyatakan sebagai berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/ywRXXoZXeAlMFxpmPrDAO1aIJtCjYTiWjzCxNGicodBn00lua4nhbEPmWAxhiOYZ1O3GwC5ek8knoUxibTgiHdlp74GY-K-FyOyyT6TVbFZ5Ne1-OGeD_0-JI9nsR9UkRIBXuT5DWWL0x1g6NI0Tjw\" alt=\"\" width=\"204\" height=\"32\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">x&#8217; = <em>x<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">y\u2019 = 2<em>k<\/em> \u2013 <em>y<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">sehingga:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/LTtn6-g-zmvudxwXJqkhTANASD_iOoERLmTbJbTY5nWg5Unp_nLTw22Sfq_rIneXe2SvnFv61rq0e41ET5g1c8Jmno1Zurhd1QxsDNSlU5cmhcreBV0C7QM5DCUYiYq2nISLZqfbT6g7uB8fhd9-Qg\" alt=\"\" width=\"215\" height=\"28\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Persamaan matriksnya adalah:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/RFTlvqUYRbxi-bTfxpfGxI_D5Kwgh026D5iCT3z9_AmtWRDwyiraPu1yMmEWbexOZk9q03S2-VB_pJ7RytO3GMZVrv6HIpNp6k6qUIAIHbfcY9iOQV7Xh3wKQ_5qxLnhjWUBgTf9YYFw1mO6sMgv8Q\" alt=\"\" width=\"184\" height=\"100\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Titik P (2, 3) direfleksikan terhadap garis . Tentukan gambar bayangan terhadap titik awalnya.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Saat direfleksikan terhadap garis y = 1, akan dihasilkan titik bayangan P\u2019 seperti berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh5.googleusercontent.com\/hLyvKlLZ9ZOsB7FGpaDG0ftN1uiFM1GADLgi_MMD4wcCAGpBFa84JsZxMkw7GXduKh6mflcvk53YTMuU2W1db6MkKPh_27I6R3dLSe_h462RPIkocnjHLQJPdMv4-v6iZ24fnoeaMKohtG7A5VkROg\" alt=\"\" width=\"187\" height=\"157\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Selanjutnya, plot titik-titik tersebut pada koordinat Cartesius.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/iRZvRZtZPIiqXVhvqS1oenW3vlyA0vPMKd8RQxc0pVvJks4T_DNZgX50cxqF4zepygSfMZXEEWUA07GADXaPb4fU62-kV5VWU6dGm7ZRY_JOx1IbsAqAlxKL1DfmRpQ5xNqE26Fg9fN-t8A8ZdXX2w\" alt=\"\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Sampai sini, apakah Quipperian sudah paham? Yuk, lanjut ke contoh soalnya!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Contoh Soal<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Agar pemahamanmu semakin paripurna, simak contoh soal di bawah ini.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Contoh Soal 1<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Suatu titik (-4, 1) direfleksikan terhadap garis <em>x<\/em> = <em>h<\/em>, hingga dihasilkan bayangan (-20, 1). Tentukan nilai <em>h<\/em>!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Diketahui:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(<em>x<\/em>, <em>y<\/em>) = (-4, 1)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(<em>x<\/em>\u2019, <em>y<\/em>\u2019) = (-20, 1)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ditanya: <em>h <\/em>=\u2026?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jawab:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nilai <em>h<\/em> bisa kamu tentukan dengan persamaan berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/BYbIXnYh9TVkN2A0nIXjTmLDPqKh5iqB2Wby6hwgYWM2kIjaLlcCdbyHGmAJ_oCWrTtMIRHJ0ke09yvyKykk4PyY2j-BdPbXVBTSJ2BygALPgWV8zRXB4VgATseQAQT7P2xhk2kdhloDKIzDJvi3hQ\" alt=\"\" width=\"199\" height=\"245\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jadi, nilai <em>h<\/em> = -12.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Contoh Soal 2<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Suatu titik yang memiliki koordinat (-3, -1) direfleksikan terhadap garis <em>y<\/em> = -2. Tentukan koordinat bayangan titik tersebut!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Saat direfleksikan terhadap garis y = -2, akan dihasilkan koordinat titik bayangan seperti berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/RVLrFb5tOltVcggKkmjwfbxd7zfOOISDdNTarCRm9K_zdZefVMtXIRuQbgRg8-5WbGMt8u8cnvjcswX4CV6T-O76jmf3vIgZDbqys6x26FaTsPAIc2xnavAj5NqZcuvjmjXwLbnws5gGEYx-0pBm0g\" alt=\"\" width=\"216\" height=\"191\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jadi, koordinat akhir titik tersebut adalah (-3, -3).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Contoh Soal 3<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Diketahui persamaan garis berikut.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/kOApNPUCQTjwALXVVQCM9Y4zMavfn7Gr8w70wctjjGQBoeh1se-cyzrSfPbDP1MIHu1VmQg30elWRX6hJy_uf2lk0DiVWiZvXZMafeqvaVOYfaZu_TX3zqbfqVIXegz1JIJspDhlligkgjE6c-HsTw\" alt=\"\" width=\"80\" height=\"24\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jika garis tersebut direfleksikan terhadap sumbu-x, tentukan persamaan garis bayangannya!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pembahasan:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mula-mula, tentukan dahulu koordinat x\u2019 dan y\u2019 sebagai koordinat titik bayangan. Pada refleksi terhadap sumbu-x, berlaku:<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh4.googleusercontent.com\/BfWZP1Oqse7mG9iu30XaVOHAHtLQGSV2IjuerSDVy1TdWnrtbc4vcb7JqyUD9qEtLQ3-Iba0lRJbXDBNQlDfFSQziPuPYQ21FH5IEcaCUtWjpiFQVOv9A6eslzYKILW7dRDq5T5JHHp0Fbg0igytGg\" alt=\"\" width=\"170\" height=\"117\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Dengan demikian:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>x<\/em> = x\u2019<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>y<\/em> = -y\u2019<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Substitusikan nilai x = x\u2019 dan y = -y\u2019 ke persamaan garis awalnya.<\/p>\n\n\n\n<figure class=\"wp-block-image is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/zjUDzuNRpBc_T38lbvEdA5_CvrttE-TdqNFyHIr8GRVVxswyVDHC6tG6amu_OTL5EZOeTmUkBJ_yTxPkQX6_u5kNJ803wDO2LOcS31_bb4qYWjCMFfHCg025TgGmpGN43olJeqg-6z_-JypqH1bVeQ\" alt=\"\" width=\"166\" height=\"98\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jadi, persamaan garis bayangannya adalah <em>y<\/em> = -2<em>x<\/em> + 5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Itulah pembahasan Quipper Blog kali ini. Semoga bermanfaat ya. Untuk mendapatkan materi lengkapnya, yuk buruan gabung Quipper Video. Salam Quipper!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hayo, siapa di antara Quipperian yang hobi bercermin? Cermin merupakan peralatan yang bisa membantu kamu untuk melihat wajah hingga bentuk tubuh yang lainnya. Hal&hellip;<\/p>\n","protected":false},"author":156447303,"featured_media":313987,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_crdt_document":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[679384865],"tags":[],"ppma_author":[679386823,679386836],"class_list":["post-313983","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-matematika"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pengertian Refleksi Matematika, Sifat, Jenis dan Contoh Soal - Quipper Blog<\/title>\n<meta name=\"description\" content=\"Refleksi Matematika adalah perpindahan setiap titik atau objek ke titik lain atau objek lain seperti halnya pembentukan bayangan pada cermin datar. 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