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Verified answer
TQ/PT = TR/SRTQ/4 = 6/8
8TQ = 24
TQ = 24/8
TQ = 3 cm
luas ∆PRS = 1/2 x (4 + 6) x 8 = 40 cm²
luas ∆PRQ = 1/2 x (4 + 6) x 3 = 15 cm²
luas PQRS = 40 - 15 = 25 cm²