Question

Jika x :y =1 :3,maka besar < C = . . .

Answer 1

Verified answer

Lihat titik A dan D
x : y = 1 : 3
x = 1/3y

2x +y= 180
2/3 y + y = 180
5/3 y = 180
y = (180 . 3)/5
y = 36 .3
y = 108

x = 1/3y
x = 1/3 . 108
x = 36

jadi
sudut A = 2(36)=72
sudutB= 36
audut D = 108
sudut C = 360-108 -72-36=144
(pilihqn A)