Jawabanmu

2014-06-09T14:52:50+07:00
1/3 x luas alas x tinggi
1/3 x 12 x 8 = 32
2014-06-09T15:08:04+07:00
T=8²+6²
=64+36
=100
=√100
=10

Lpl = La + 4 x 1/2 x 12 x 10
     =sxs + 4 x 1/2 x12 x10
   =12x12 =240
  =384 cm²