➮Sudut x
3x = 180° - 120°
3x = 60°
x = 20°
➮Sudut y
2y = 3x
2y = 60°
y = 30°
➭Besar sudut x + y
= x + y
= 20° + 30°
= 50° (B.)
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➮Sudut x
3x = 180° - 120°
3x = 60°
x = 20°
➮Sudut y
2y = 3x
2y = 60°
y = 30°
➭Besar sudut x + y
= x + y
= 20° + 30°
= 50° (B.)