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maka
180 = sudut R + sudut Q
180 = (x+36) + 126
180-126=x+36
54=x+36
x=18
sudut P =sudut R
sudut P= x+36
sudut P=18+36
sudut P= 54 derajat
maka jawabannya yang D
360 = x + 36 + x + 36 + 126 + 126
360 = 2x + 324
36 = 2x
x = 18