Berapah nilai y

<p>Gunakan <i>Teorema Phytagoras</i> :</p><p>a² + b² = c² (<i>c = sisi terpanjang, hipotenusa</i>)</p><p>&nbsp;</p><p>Maka :</p><p>a² + b² = r²</p><p>9² + 12² = r²</p><p>81 + 144 = r²</p><p>r² = 225</p><p>r = √225</p><p>r = 15 cm.</p><p>&nbsp;</p><p>c² + d² = y²</p><p>8² + 15² = y²</p><p>64 + 225 = y²</p><p>y² = 289</p><p>y = √289</p><p>y = 17 cm.</p><p>&nbsp;</p><p>Jadi, y bernilai 17.</p><p>&nbsp;</p><p>Semoga membantu.</p>