Jawabanmu

2014-04-23T14:19:38+07:00
2014-04-23T14:22:30+07:00
Lp.prisma = ( 2 x luas alas ) + ( keliling alas x tinggi )
               =  2 x ( 12 x 8 ) + ( 12 + 8 ) x 2 x 15
               =  192 + 40 x 15
               =  3,480 cm2