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3x - 5 + x + 25 = 180
4x + 20 = 180
4x = 160
x = 40
Sudut SQR = 40 + 25 = 65°
(3x - 5)" + (x + 25)" = 180"
4x + 20 = 180
4x = 180 - 20
4x = 160
x =
x = 40
maka, ...
sudut PQS = (x + 25)"
= (40 + 25)"
= 65"
Ket: (") = derajat