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tinggi limas = 12 cm
v = 1/3 x 10 cm x 10 cm x 12 cm
= 400 cm3
(Cari tingginya pake phytagoras)
= √169 - 25
= √144
= 12 cm
luas alas = 10x10 = 100
Volume = 1/3 x L alas x tinggi limas
= 1/3 x 100 x 12
= 400 cm³