Jawabanmu

2014-07-20T07:16:17+07:00
Panjang Rusuk alas
panjang 8 cm x 2 = 16 cm
Lebar 6 cm x 2 = 12 cm

Panjang rusuk miring alas
= \/8² + 6²
= \/64 + 36
= \/ 100
= 10 cm : 2 = 5 cm
Panjang rusuk miring segitiga
= \/12² + 5²
= \/144 + 25
= \/169
= 13 cm x 4 = 52 cm

Jumlah rusuk
16 + 12 + 52 = 80 cm