tentukan nilqi x+y. jika sudut p:5x,Q:3y,R:7x dan s:2y.

5x + 7x = 180°
12 x = 180°
x = 180/12
x = 15°

2y+3y = 180°
5y = 180°
y = 180°/5
y = 36°

x + y = 15° + 36° = 51°

< P + < R = 180°
5x + 7x = 180°
12x = 180°
x = 180°/12°
x = 15

< Q + < S = 180°
3y + 2y = 180°
5y = 180°
y = 180°/5°
y = 36

Nilai x + y = 15 + 36
= 51
Jadi nilai x + y adalah 51