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sisi persegipanjang: 16 cm
v. limas: 1.280 cm3
jawab:
L.alas: sisi x sisi= 16cm x 16cm = 256cm2
diagonal sisi = 16√2
1/2 diagonal sisi= 8√2
tinggi sisi tegak= (3 x Volume) : La= (3 x 1.280) : 256= 15cm
L.alas = 256cm²