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Verified answer
Mapel MatematikaBab Sudut
4a = 130° (Sudut bertolak belakang)
a = 32,5°
3b - 9° = 81° (sudut bertolak belakang)
3b = 90°
b = 30°
(2c + 11°) + (3b - 9°) = 180° (sudut berpelurus)
2c + 3(30°) + 2° = 180°
2c = 88°
c = 44°
5x + 4° = 49° (sudut bertolak belakang)
5x = 45°
x = 9°
8y - 5° + 5x + 4° = 180° (sudut berpelurus)
8y - 1° + 5(9°) = 180°
8y = 136°
y = 17