Bantu jawab ya besok di kumpulin
4z = 80 (bersebrangan)
z = 20
40+7x = 180 (berpelurus)
7x = 140
x= 20
40 + 80 + 2y = 180 (sepihak)
2y = 60
y = 30
x + y + z = 20 + 30 + 20 = 70
Jawaban:
4z = 80°
z = 20°
4(20°) + 2y + 40° = 180°
120° + 2y = 180°
2y = 60°
y = 30°
40° + 7x = 180°
7x = 140°
x = 20°