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81' + 3x + 8x = 180'
11x = 99'
x = 9'
maka sudut P = 3x = 3(9') = 27'
sudut Q = 8x = 8(9') = 72'
Semoga membantu :)
Perbandingan sudut PQ = 3: 8
sudut R = 81
jumlh sudut segitiga = 180
Faktor penali = x
maka :
180 = sudut P + Q + R
180 = 3x + 8x + 81
180 = 11x + 81
11x = 180-81
x = 99/11
x = 9
jdi sudut P = 3 x 9= 27 derajat
sudut Q = 8 x 9 = 72 derajat