Jawabanmu

2014-07-20T13:24:47+07:00
A. Panjang sisi belah ketupat
16 : 2 = 8 cm 12 : 2 = 6 cm
= \/8² + 6²
= \/64 + 36
= \/100
= 10 cm

B. Luas alas prisma
L = d1 x d2 x 1/2
L = 16 x 12 x 1/2
L = 96 cm²

C. Luas permukaan prisma
= La x 2 + Ka x t
= 96 x 2 + (10 x 4) x 18
= 192 + (40 x 18)
= 192 + 720
= 912 cm²