please tolong!! bsk dikumpulkan

∠Δ = 180°
Δ Sama Kaki = 2 sudut sama besar
∠RQS berpelurus dengan∠PQR

Maka
∠PQR = 180 - 112
           = 68°
∠P + ∠R + ∠Q = 180°
x + x + 68 = 180
2x + 68 = 180
2x = 180 - 68
2x = 112°
x = 112 ÷ 2
x = 56°

∠P = 56°