bantu jawab jangan lupa kasih cara
40° + 7 = 180°
7× = 180° - 40°
7× = 140°
7× = 140° ÷ 7
7× = 20°
4z = 80°
z = 80° ÷ 4 = 20°
2y° + 4z° + 40° = 180°
2y° + 4(20)° + 40° = 180°
2y° + 80° + 40° = 180°
2y° + 120° = 180°
2y° + 180° - 120°
2y° + 60°
y = 60° ÷ 2
y = 30°
Nilai (X,Y, Z) 20° + 30° + 20° = 70° (D). ✅
