Jawabanmu

2014-04-11T21:20:14+07:00
V = L.a×t
567 = s×s×21
 \frac{567}{21} = s×s
27 = s×s
s = 3 \sqrt{3}

kalo sisinya udh ketemu tinggal cari bidang diagonalnya
2 4 2
2014-04-11T21:21:50+07:00
V.limas = 1/3. la.t
567=1/3.la.21
567=7la
la= 81
sisi = 9

diagonal bidang nya = 1/2 n (n-3).
diagonal bidangnya = 1/2.9(9-3)
diagonal bidangnya = 1/2.9.6
diagonal bidangnya = 27