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=√676-100
=√576
=24
luas alas prisma = 1\2a×t
= 1\2×24×10
=120
LP prisma =( 2×luas alas)+(keliling alas×tinggi)
960cm2 = (2×(120)+[(a+b+c)×t]
960cm2 = (2×(120)+[(26+10+24)×t]
960cm2 = 240+60t
960 cm2 = 300t
960\300 = t
3,2 = t