Jawabanmu

2014-04-13T15:39:30+07:00
V prisma = Luas alas x tinggi
pertama kita cari tinggi nya dulu
 t^{2} =  20^{2} -  12^{2}
 t^{2} = 400 - 144
 t^{2} = 256
t = 16
L alas =  \frac{1}{2} × d d_{1} × d d_{2}
L alas =  \frac{1}{2} × 18 × 24
L alas = 216

Volume = 216 × 16 = 3456
2 5 2