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b. PQ = PR
=15cm
SR = QS
=8cm
QR = QS + SR
=8cm+8cm=16cm
2) a. ∆ACD + ∆CBD
b. ‹ABC = ‹CAD = 70°
‹ACD = ‹DCB =20°
‹ACB = 40°
3-5 aku gatau ^^