Jawabanmu

2014-06-06T10:02:02+07:00
V= 1/3.La.t
  =1/3.s.s.t
1296=1/3.18.18.t
1296/108 = t
12=t

L= La.4.Lsegitiga
  = s.s.4.1/2.a.t
  =18.18.4.1/2.18.15 = 174960
2014-06-06T10:09:22+07:00
V= 1/3.La.t
  =1/3.s.s.t
1296=1/3.18.18.t
1296/108 = t
12=t

L= La.4.Lsegitiga
  = s.s.4.1/2.a.t
  =18.18.4.1/2.18.15 = 174960
cm²

Semoga Membantu :)