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2y-15 = 57-y
2y+y = 57+15
3y = 72
y = 24
< K = < M = 57-24 = 33°
< L = < N = 180⁰-33⁰ = 147°
Semoga membantu :)
(2y - 15)° = (57 - y)°
2y + y = 57 + 15
3y = 72
y = 24°
sudut K = 2y - 15
= 2.(24) - 15
= 48 - 15
= 33°
sudut M = sudut K = 33°
suduut K dan sudut L sepihak (brjumlah 180°)
sudut K + sudut L = 180°
33° + sudut L = 180°
sudut L = 180° - 33°
= 147°
sudut N = sudut L = 147°