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sudutq=x
sudut r=y
x=16+y
x+y = 90 (karena segitiga jumlah sudutnya 180 derajat)
16+y+y=90
2y=90-16
=74
y=74/2=37
x=16+y=16+37=53
Q = x + 16
R = x
jumlah seluruh sudut segitiga = 180
180 = P + Q + R
180 = 90 + x + 16 + x
180 = 106 + 2x
180 - 106 = 2x
74 = 2x
74/2 = x
37 = x
Q = x + 16
= 37 + 16
= 53
R = x
= 37