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(d1 x d2) : 2 = [(10+17) x (8 x 2)] ; 2 = (27 x 16) ; 2 = 216
mudah-mudahan betul
= 17^2 x 8^2
= 289 - 64
= 225
CO = 15
AB = 8+8 = 16
CD = 15+10 = 25
L = 1/2 x D1 x D2
= 1/2 x 16 x 25
= 200