Question

Jajarg genjang lebar 30 dm tinggi 14 dm lebar bawah 20 dm

Answer 1

L.yg diarsir = L trapesium - L 1/2 lingkaran
= (a+b)/2*t - 1/2 phi *r^2
= (30+20)/2*14 - 1/2 * 22/7 *7*7
= 50/2 * 14 - 11*7
= 25*14 - 77
= 350 - 77
= 273