Jawab donk pake cara plisss

5x+4x=180°
      9x=180°
        x=180°/9
        x=20°

y=5x
  =5(20°)
  =100°

z=4x
  =4(20°)
  =80°

5x + 4x + y + z = 360

9x + y + z = 360

y = 5x
z = 4x

Karena trapesium sama kaki

Jadi 18 x = 360

x = 360 : 18 = 20

nilai x = 20
y = 5x = 5.20 = 100
z = 4x = 4.20 = 80

CMIIW