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s kuadrat = 144
s = √144
s = 12 cm
a x t /2 = L sisi tegak (L segitiga)
12 x t/2 = 60
6 x t = 60
t = 10
T limas = √ 10 kuadrat - 6 kuadrat
= √ 100-36
= √ 64
= 8cm
V limas = 1/3 x L.alas x T. limas
= 1/3 x 144 x 8
= 48 x 8
= 384 cm3