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Verified answer
Garis dan Sudut<POR + <QOR = 180°
4X + 5 + 7X + 10 = 180°
11X + 15 = 180°
11X = 180 - 15
11X = 165
X = 165/11
X = 15
Besar pelurus <POR = besar <QOR
= 7X + 10
= 7 x 15 + 10
= 105 + 10
= 115° (C).
*semoga membantu. sukses selalu ^_^