Diketahui jajar genjang KLMN mempunyai sudut K =( 2y -15)° dan sudut M =(57-y)°. Tentukan besar sudut K,sudut L,dan sudut N...

Jajargenjang
< K = 2y -15
< M = 57 - y
<K = < L

2y - 15 = 57 -y
2y + y = 57 + 15
3y = 72
y = 24

< K = 2( 24) - 15 = 33°
< M = 57 - 24 = 33°
< K + < M = 66°

(< L+ < N) = 360° - 66° = 294° /2 = 147°
< L = < N = 147°