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8 (12-x) = 12x
96-8x =12x
96=20x >>> x: 4,8 (OQ)
maka OA: 12-4,8= 7,2 (OA)
A. <AOB =<POQ (tolak belakang, <A = <Q (sudut dalam besebrangan)
<B = <P
dan perbandingan PQ/AB = OQ/ OA = OP/OB
8/12 = 4,8/7,2
2/3 = 2/3
sehingga segitiga AOB dan OPQ sebangun