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10×4×22 =
10×88 = 880 cm
L.alas + tutup = 2 x L. trapesium = 2 x( 8+14) x 10 / 2 = 220 cm²
L sisi tegak = (8x4) + (14x4) + (2x10x4)
= 32 + 56 + 80 = 168 cm²
__________________________________________________ +
L.permukaan prisma = 388 cm²