tolong jawab yaaa besok di kumpul

a) a+a+a = 180°
3a = 180°
a = 180 : 3
a = 60°

b) 2x+3x+x = 90°
6x = 90°
x = 90 : 6
x = 15°

2x = 2.15 = 30°
3x = 3.15 = 45°
x = 15°

c) b+37° = 90°
b = 90°-37°
b = 53°

d) 10x+15x+20x = 90°
45x = 90°
x = 90° : 45
x = 2°

10x = 10.2 = 20°
15x = 15.2 = 30°
20x = 20.2 = 40°

e) a+45° = 180°
a = 180°-45°
a = 135°

c+45° = 180°
a = 180°-45°
a = 135°

c+d = 180°
135°+d = 180°
d = 180°-135°
d = 45°




maaf kalau salah dan semoga membantu