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x0 = 180 - (85+35) = 180-120 = 60 derajat
y0 = 180 - 60 = 120 derajat
z0 = 180 - 35 = 145 derajat
4.
x = 180 - 3x
x + 3x = 180
4x = 180
x = 180/4
x0 = 45 derajat
Sudut SPR = 3x = 3(45) = 135 derajat
Sudut PRQ = 180 - (80+45) = 180-125 = 55 derajat
Tolong di hitung ulang ya, takutnya ada yang salah hitung.