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SR= 1/2QR = 1/2(10) =5cm
QS= 5/4PQ = 5/4(10) = 12,5cm
PR = 4/5 SR =4/5(5) = 4cm
Keliling= 2(SR)+ 2(QR)
= 2(5) + 210)
=10 + 20
= 30 cm
Luas = 1/2. D1 .D2
= 1/2 x PR x QS
= 1/2 x 4 x 12,5
= 25cm²