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luas permukaan prisma = 672
2 (luas alas ) + ( kliling alas x t) = 672
2 ( 16 x 12 : 2) + ( 4 x 10 x t ) = 672
2 ( 96 ) + (40 x t) = 672
192 + 40 t = 672
40t = 672-192
40t = 480
t = 480/40
t = 12
maka tingiinya adalah 12 cm