Nilai y – x adalah…a.5°b.10°c.15°d.20°

SUDUT

3x = 60 (sehadap)
x = 60/3
x = 20°

4y = 180 – 3x (berpelurus)
4y = 180 – 60
4y = 120
y = 120/4
y = 30°

y – x = 30 – 20 = 10°

4y = 120
y = 120 : 4
y = 30

3x = 60
x = 60 : 3
x = 20

y – x = 30- 20 = 10