tolong bantu ya . pake cara

Jajargenjang
alas PQ = 7cm
sisi PS = QR = 15 cm
tinggi = QR² - QT²
= 15² - 9² = 225 - 81 = √ 144 = 12 cm

Luas jajargenjang PQRS = alas × tinggi
= 7 × 12 = 84 cm²