Jawabanmu

2014-05-10T08:18:30+07:00
L.alas = 324 cm2 V = 1296 cm3
luas sisi=segitiga= 1/2 x a x t = 1/2 x 18 x 15 = 135
Lpermukaan = L.alas + (4xL. sisi)
                   = 324 + (4 x 1/2.18.15 )
                   = 324 + 540 = 864 cm2