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9x = 180 derajat
x = 20
P = 1 x 20 = 20 derajat
Q = 3 x 20 = 60 derajat
R = 5 x 20 = 100 derajat
jumlah perbandingan = 1 + 3 + 5 = 9
sudut P + sudut Q + sudut R =
sudut P = x
=
sudut Q = x
=
sudut R = x
=