Jawabanmu

2014-07-20T13:09:43+07:00
Luas permukaan prisma
= La x 2 + Ka x t
= (12x16x1/2) x 2 + (12+16+20) x 25
= (96 x 2) + (48 x 25)
= 192 + 1200
= 1392 cm²