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208 = 4s
208/4 = s
52 = s
L = 1/2 x d1 x d2
= 1/2 x 96 x 40
=1920
panjang diagonal BD=√52²-48²
=√2704-2304
=√400
=20cm
Luas Belah Ketupat= 1/2 × d1 × d2
= 1/2 × 96 × 40
= 1920cm²