<img align="middle" alt="begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row DC equals cell square root of 20 squared minus 12 squared end root end cell row cell space space space end cell equals cell square root of 400 minus 144 end root end cell row cell space space space space space space end cell equals cell square root of 256 end cell row cell space space space end cell equals cell 16 space cm end cell end table end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mtable columnspacing=¨0px¨ columnalign=¨right center left¨»«mtr»«mtd»«mi»DC«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«msqrt»«msup»«mn»20«/mn»«mn»2«/mn»«/msup»«mo»-«/mo»«msup»«mn»12«/mn»«mn»2«/mn»«/msup»«/msqrt»«/mtd»«/mtr»«mtr»«mtd»«mo»§#160;«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«msqrt»«mn»400«/mn»«mo»-«/mo»«mn»144«/mn»«/msqrt»«/mtd»«/mtr»«mtr»«mtd»«mo»§#160;«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«msqrt»«mn»256«/mn»«/msqrt»«/mtd»«/mtr»«mtr»«mtd»«mo»§#160;«/mo»«mo»§#160;«/mo»«mo»§#160;«/mo»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»16«/mn»«mo»§#160;«/mo»«mi»cm«/mi»«/mtd»«/mtr»«/mtable»«/mstyle»«/math»" height="84" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -43px;" width="122" />&nbsp;

luas yang diarsir =&nbsp;<img align="middle" alt="begin mathsize 14px style L subscript increment A D C end subscript plus L subscript increment A B C end subscript end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«msub»«mi»L«/mi»«mrow»«mo»§#8710;«/mo»«mi»A«/mi»«mi»D«/mi»«mi»C«/mi»«/mrow»«/msub»«mo»+«/mo»«msub»«mi»L«/mi»«mrow»«mo»§#8710;«/mo»«mi»A«/mi»«mi»B«/mi»«mi»C«/mi»«/mrow»«/msub»«/mrow»«/mstyle»«/math»" height="15" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -5px;" width="96" />&nbsp;

<img align="middle" alt="begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row straight L equals cell 1 half cross times 12 cross times 16 space plus 1 half cross times 20 cross times 15 end cell row blank equals cell 96 plus 150 end cell row blank equals cell 246 space cm squared end cell end table end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mtable columnspacing=¨0px¨ columnalign=¨right center left¨»«mtr»«mtd»«mi mathvariant=¨normal¨»L«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mfrac»«mn»1«/mn»«mn»2«/mn»«/mfrac»«mo»§#215;«/mo»«mn»12«/mn»«mo»§#215;«/mo»«mn»16«/mn»«mo»§#160;«/mo»«mo»+«/mo»«mfrac»«mn»1«/mn»«mn»2«/mn»«/mfrac»«mo»§#215;«/mo»«mn»20«/mn»«mo»§#215;«/mo»«mn»15«/mn»«/mtd»«/mtr»«mtr»«mtd/»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»96«/mn»«mo»+«/mo»«mn»150«/mn»«/mtd»«/mtr»«mtr»«mtd/»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»246«/mn»«mo»§#160;«/mo»«msup»«mi»cm«/mi»«mn»2«/mn»«/msup»«/mtd»«/mtr»«/mtable»«/mstyle»«/math»" height="72" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMgAAABICAYAAACz6LpGAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAjYkPj7AAABTFJREFUeNrtnd+HHlcYx4+qqFrlVStqL8qKqFgVakXVihK9iKroTeWiIkIvqv9BVW+rF71aua2otcSqiKjSi1zkokpERFSFqKqIChG9WPEq0/OY55XZ2flxzpkz533nnc+Hx+adjHfeOc885zzPzDnfMSY9x619Ze2ugXmCHxaUH6xdtJbRFPgB6sEx+AFwDH4AHIMfAMfgB8Ax+AFwDOAHHAP4YZCNlFVYH7Q9CPvQ2i1rU/172dpKwuMLr1v7ztoj/R2/WjubyH8p/ODaxu9Zu6P7SXttJfRD5tIWi96LfKnmul1oexB2w9ppay/p50vW9hIeXy6Um4WLQX7HGWs/L3AH59sOLm28bu0Pa+/oZ/n7QLen8EO2SA0c0zlNjRJybuLE/YTH/9ra5wPMAELboa6NtzVwilzU7Sn8EDVAshZL5Rwfp7j+rjetPUx4fEkp1gZaR4S0Q10by+fVitTzr0R+WJoRZMYvarEvnuvWziU8/r7WG3f131etvR2po8oW0A91bfxfzb7TRH7I9FhSB+5YOzmPAMk8LPUIsqIN81HiEUwujB+1iBTesHbNMUj7ygD68kNTG9cFyPPE18Gr2vZ3tBYcXIrVRw1y1NqutWNzOP4/1l4ubZtY+3PJapC2Nn5QkWKtNqS7fdeiq1V3vJbxLlbbuU20B5/M6fhXNCcv92K3l+gulksbb2tRXi7SLyfyQ5nXTH5XbbA1SKyLR/LhjTke/4TJnw2cKPS0O1XD+4BrSJc2nt3mneX+p3T0WE/kh+8LHdW6prmfuKZOQw+MpvPp+5xdvnvT5M9C9rWnPbmEnZNLO2xpWjPVGmAroR/kFvOTwrHPGwBYTPqe3gH4YdD4TO8A/DB62qZ3AH4YNS7TOwA/jBbX6R2AH0aFz/QOwA+jwmd6B+CHUeEzvQPwwyhz3Q2aAT9ANcs4pQU/AAAAAAAAAAAAAAAAAAAAAERF1Dpk/o+sWhP1iippm9BXAbhOkYgig2/6leqHEfK+ydccHC0Ey2/moMRNl1cBuAZIDBl8H6l+ACekt32lojffLXzu8iqALNL+Lt/jK9UPIyNEm/eeObzuQDRp/y0F0doAAiREqh+gkU0dLWYBICvY9sxBeXufVwF0VSbvIoMfKtUP0Ijoz4rm6XMdLT4wB+Xtu7wKINYIMqNJBj9Eqh9IsbwX3Eia8rjwucurAGIHSPE3lu94+Ur1AwTxWalI7/IqgL4CpEoG30eqH8AJSZXeLRTnckE9NfnzhGIKFvoqgFgB4iKDn0qqH0aEaC7d1/z9qRbgmzXFfJ+vAoglg9+nVD8AAAAAAAAAAAAAAAAALCCyZkWm6f9t8jfFAkCBb60dMfnT80c0B0A1MqeMKe4ANXxhcoEJgM5Iri4zdaf6V6aGrzTsL5Mb62bchiqfxEREKK6bw+tXAIK4Ye20yZVKBJk1u1ezryyS+r0mQLoon8TiuJ7PEdwKfSEX9n7N/4k0z/maAOmifBKLm+bFsmCAQ8RYciuLkh7WpGJXC8cpE6p8cky/95nWDsVzecu8WINyXwPwgsmVWKQIl9u5HzecP0B0JH8/V5Fa3dMaoy5AfJRPZmzq8dY0RdsuXeyyivBUYV/Zdk23yUgnwnBPcBmkQC7QHS3Cy1yp6KnLhCif3NYRpG40DN0GEDXFkjXmuy0Xa9v3hSifTFvOhQCBuTPRnn/iGYhVo4yv8kmTbi4BAgtTc2wEjFRlQpRPpGb5SdMxuTX7DQECQ0nLfANkVkj7Kp/Mnl2IUN2nBAj48D9YoVoHOR0ZJwAAAmB0RVh0TWF0aE1MADxtYXRoIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8xOTk4L01hdGgvTWF0aE1MIj48bXRhYmxlIGNvbHVtbmFsaWduPSJyaWdodCBjZW50ZXIgbGVmdCIgY29sdW1uc3BhY2luZz0iMHB4Ij48bXRyPjxtdGQ+PG1pIG1hdGh2YXJpYW50PSJub3JtYWwiPkw8L21pPjwvbXRkPjxtdGQ+PG1vPj08L21vPjwvbXRkPjxtdGQ+PG1mcmFjPjxtbj4xPC9tbj48bW4+MjwvbW4+PC9tZnJhYz48bW8+JiN4RDc7PC9tbz48bW4+MTI8L21uPjxtbz4mI3hENzs8L21vPjxtbj4xNjwvbW4+PG1vPiYjeEEwOzwvbW8+PG1vPis8L21vPjxtZnJhYz48bW4+MTwvbW4+PG1uPjI8L21uPjwvbWZyYWM+PG1vPiYjeEQ3OzwvbW8+PG1uPjIwPC9tbj48bW8+JiN4RDc7PC9tbz48bW4+MTU8L21uPjwvbXRkPjwvbXRyPjxtdHI+PG10ZC8+PG10ZD48bW8+PTwvbW8+PC9tdGQ+PG10ZD48bW4+OTY8L21uPjxtbz4rPC9tbz48bW4+MTUwPC9tbj48L210ZD48L210cj48bXRyPjxtdGQvPjxtdGQ+PG1vPj08L21vPjwvbXRkPjxtdGQ+PG1uPjI0NjwvbW4+PG1vPiYjeEEwOzwvbW8+PG1zdXA+PG1pPmNtPC9taT48bW4+MjwvbW4+PC9tc3VwPjwvbXRkPjwvbXRyPjwvbXRhYmxlPjwvbWF0aD6QdnmwAAAAAElFTkSuQmCC" style="max-width: none; vertical-align: -37px;" width="200" />&nbsp;

Jadi luas daerah yang diarsir&nbsp;<img align="middle" alt="begin mathsize 14px style 246 space cm squared end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mn»246«/mn»«mo»§#160;«/mo»«msup»«mi»cm«/mi»«mn»2«/mn»«/msup»«/mrow»«/mstyle»«/math»" height="15" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -1px;" width="57" />&nbsp;

Tentukan luas daerah yang diarsir dari gambar berikut!

!<img alt="" src="https://imgix2.ruangguru.com/assets/miscellaneous/png_3pa1xj_6088.png" style="width: 290px; height: 163px;" />

&nbsp;

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