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= 3
luas permukaan
Lp = 6 x s²
= 6 x 3²
= 6 x 9
= 54 cm²
2.) luas permukaan
Lp = 2 (pxl +pxt + lxt)
= 2 (12 x 8 + 12 x 5 + 8 x 5)
=2 ( 96 + 60 + 40 )
= 2 ( 196 )
= 392 cm²