Jawabanmu

Jawaban paling cerdas!
2014-09-11T21:41:27+07:00
Luas alas = rusuk x 4
= 18 x 4 = 72 cm2

luas selimut = luas segitiga x 4
= (a x t : 2 ) x 4
= ( 18 x 12 : 2) x 4
= 108 x 4 = 132 cm2

luas permukaan = 72 + 132 = 204 cm2
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