Ka bantu aku please pake cara

Sudut berhadapan
< S + < Q = 180°
10 x + 8 x = 180°
18 x = 180°
x = 10
< S = 10 x = 10 × 10 =100°
< Q = 8 × = 8 × 10 = 80°
< R = 11 x = 11 × 10 = 110°

< P + < S + < Q + <R = 360°
< P + 100 + 80 + 110 = 360°
< P = 360 ° – 290° = 70°