Gambar&nbsp;<img align="middle" alt="begin mathsize 14px style triangle ABC end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mo»§#9651;«/mo»«mi»ABC«/mi»«/mrow»«/mstyle»«/math»" height="12" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -1px;" width="45" />&nbsp;dan&nbsp;<img align="middle" alt="begin mathsize 14px style triangle PQR end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mo»§#9651;«/mo»«mi»PQR«/mi»«/mrow»«/mstyle»«/math»" height="13" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -2px;" width="45" />

<img alt="" src="https://imgix2.ruangguru.com/assets/miscellaneous/png_cduf6t_1603.png" style="width: 299px; height: 89px;" />

<img align="middle" alt="begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell angle straight A plus angle straight B plus angle straight C end cell equals cell 180 degree end cell row cell angle straight C end cell equals cell 180 degree minus open parentheses angle straight A plus angle straight B close parentheses end cell row cell angle straight C end cell equals cell 180 degree minus open parentheses 31 degree plus 112 degree close parentheses end cell row cell angle straight C end cell equals cell 180 degree minus 143 degree end cell row cell angle straight C end cell equals cell 37 degree 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»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»A«/mi»«mo»+«/mo»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»B«/mi»«mo»+«/mo»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»C«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»180«/mn»«mo»§#176;«/mo»«/mtd»«/mtr»«mtr»«mtd»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»C«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»180«/mn»«mo»§#176;«/mo»«mo»-«/mo»«mfenced»«mrow»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»A«/mi»«mo»+«/mo»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»B«/mi»«/mrow»«/mfenced»«/mtd»«/mtr»«mtr»«mtd»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»C«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»180«/mn»«mo»§#176;«/mo»«mo»-«/mo»«mfenced»«mrow»«mn»31«/mn»«mo»§#176;«/mo»«mo»+«/mo»«mn»112«/mn»«mo»§#176;«/mo»«/mrow»«/mfenced»«/mtd»«/mtr»«mtr»«mtd»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»C«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»180«/mn»«mo»§#176;«/mo»«mo»-«/mo»«mn»143«/mn»«mo»§#176;«/mo»«/mtd»«/mtr»«mtr»«mtd»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»C«/mi»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»37«/mn»«mo»§#176;«/mo»«/mtd»«/mtr»«/mtable»«/mstyle»«/math»" height="92" role="math" 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<img align="middle" alt="begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell angle straight P plus angle straight Q plus angle straight R end cell equals cell 180 degree end cell row cell angle straight R end cell equals cell 180 degree minus open parentheses angle straight P plus angle straight Q close parentheses end cell row cell angle straight R end cell equals cell 180 degree minus open parentheses 37 degree plus 31 degree close parentheses end cell row cell angle straight R end cell equals cell 180 degree minus 68 degree end cell row cell angle straight R end cell equals cell 112 degree end cell row blank blank blank 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»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»P«/mi»«mo»+«/mo»«mo»§#8736;«/mo»«mi 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Dalam&nbsp;<img align="middle" alt="begin mathsize 14px style triangle ABC end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mo»§#9651;«/mo»«mi»ABC«/mi»«/mrow»«/mstyle»«/math»" height="12" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -1px;" width="45" />&nbsp;dan&nbsp;<img align="middle" alt="begin mathsize 14px style triangle PQR end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mo»§#9651;«/mo»«mi»PQR«/mi»«/mrow»«/mstyle»«/math»" height="13" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -2px;" width="45" />,&nbsp;<img align="middle" alt="begin mathsize 14px style straight m angle straight A equals 31 degree end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mi mathvariant=¨normal¨»m«/mi»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»A«/mi»«mo»=«/mo»«mn»31«/mn»«mo»§#176;«/mo»«/mrow»«/mstyle»«/math»" height="13" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -1px;" width="77" />,&nbsp;<img align="middle" alt="begin mathsize 14px style straight m angle straight B equals 112 degree end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mi mathvariant=¨normal¨»m«/mi»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»B«/mi»«mo»=«/mo»«mn»112«/mn»«mo»§#176;«/mo»«/mrow»«/mstyle»«/math»" height="13" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -1px;" width="84" />,&nbsp;<img align="middle" alt="begin mathsize 14px style straight m angle straight P equals 37 degree end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mi mathvariant=¨normal¨»m«/mi»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»P«/mi»«mo»=«/mo»«mn»37«/mn»«mo»§#176;«/mo»«/mrow»«/mstyle»«/math»" height="13" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -1px;" width="75" />&nbsp;dan&nbsp;<img align="middle" alt="begin mathsize 14px style straight m angle straight Q equals 31 degree end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mi mathvariant=¨normal¨»m«/mi»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»Q«/mi»«mo»=«/mo»«mn»31«/mn»«mo»§#176;«/mo»«/mrow»«/mstyle»«/math»" height="14" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -2px;" width="78" />.

a. Gambarlah&nbsp;<img align="middle" alt="begin mathsize 14px style triangle ABC end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mo»§#9651;«/mo»«mi»ABC«/mi»«/mrow»«/mstyle»«/math»" height="12" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -1px;" width="45" />&nbsp;dan&nbsp;<img align="middle" alt="begin mathsize 14px style triangle PQR end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mo»§#9651;«/mo»«mi»PQR«/mi»«/mrow»«/mstyle»«/math»" height="13" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -2px;" width="45" />&nbsp;kemudian tentukan besar&nbsp;<img align="middle" alt="begin mathsize 14px style angle straight C end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»C«/mi»«/mrow»«/mstyle»«/math»" height="13" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -1px;" width="24" />&nbsp;dan&nbsp;<img align="middle" alt="begin mathsize 14px style angle straight R end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mo»§#8736;«/mo»«mi mathvariant=¨normal¨»R«/mi»«/mrow»«/mstyle»«/math»" height="13" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -1px;" width="23" />!

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