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k = 4 x s
= 4 x 10
= 40
La = 16 x 12 : 2
= 16 x 6
= 96 cm²
luas permukaan prisma
Lp = 2 x La + k x t
= 2 x 96 + 40 x 12
= 192 + 480
= 672 cm²
jawabnaya 672 cm