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4s = 208
s = 208 / 4
s = 52 cm
panjang 1/2 diagonal = √s² - 1/2d²
= √52² - (96/2)²
= √2704 - 48²
= √2704 - 2304
= √400
= 20 cm
panjang diagonal = 2 * 20
= 40 cm
luas belah ketupat = 1/2 d1 d2
= 1/2 * 96 * 40
= 48 * 40
= 1.920 cm²