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=100
luas sisi tegak = 5(kuadrat)+12(kuadrat)
=169(akar)
=13
= 13.10.2
=260
luas tot= 100+260
=360
luas selimutnya = 4 x 1/2 x a x t = 4 x 1/2 x 10 x 13 = 260
jadi luas permukaanya = 360 cm persegi