Jawabanmu

2014-04-06T15:02:12+07:00
d = s√2 ← d bangun
d ruang d² = (s√2)² + s²
d² = 2s² + s² = 3s²
12² = 3s² → 144 = 3s²
s² = 144/3 = 48
s = 4√3 cm

L = 6s² = 6(4√3)² = 6(16*3)
= 288 cm²
Komentar sudah dihapus
144/3 = 4√3
144/3 = 48 kn
trus 4akar 3 = 91