Segitiga ABC adalah segitiga siku-siku sama kaki, sehingga dengna tripel pythagoras,

<img align="middle" alt="begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell AB squared plus BC squared end cell equals cell 24 squared end cell row cell 2 AB squared end cell equals 576 row cell AB squared end cell equals 288 row AB equals cell square root of 288 end cell row AB equals cell square root of 144 cross times 2 end root end cell row AB equals cell 12 square root of 2 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»«msup»«mi»AB«/mi»«mn»2«/mn»«/msup»«mo»+«/mo»«msup»«mi»BC«/mi»«mn»2«/mn»«/msup»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«msup»«mn»24«/mn»«mn»2«/mn»«/msup»«/mtd»«/mtr»«mtr»«mtd»«mn»2«/mn»«msup»«mi»AB«/mi»«mn»2«/mn»«/msup»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»576«/mn»«/mtd»«/mtr»«mtr»«mtd»«msup»«mi»AB«/mi»«mn»2«/mn»«/msup»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»288«/mn»«/mtd»«/mtr»«mtr»«mtd»«mi»AB«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«msqrt»«mn»288«/mn»«/msqrt»«/mtd»«/mtr»«mtr»«mtd»«mi»AB«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«msqrt»«mn»144«/mn»«mo»§#215;«/mo»«mn»2«/mn»«/msqrt»«/mtd»«/mtr»«mtr»«mtd»«mi»AB«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»12«/mn»«msqrt»«mn»2«/mn»«/msqrt»«mo»§#160;«/mo»«mi»cm«/mi»«/mtd»«/mtr»«/mtable»«/mstyle»«/math»" role="math" src="data:image/png;base64,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" style="max-width: none;" />

Jadi, panjang AB adalah&nbsp;<img align="middle" alt="begin mathsize 14px style 12 square root of 2 end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mn»12«/mn»«msqrt»«mn»2«/mn»«/msqrt»«/mrow»«/mstyle»«/math»" role="math" src="data:image/png;base64,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" style="max-width: none;" /> cm.

Panjang sisi AB pada gambar di bawah adalah...

<img alt="" src="https://imgix2.ruangguru.com/assets/miscellaneous/png_xxgpsg_5883.png" style="width: 293px; height: 300px;" />

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Panjang sisi AB pada gambar di bawah adalah...

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