Odpowiedzi

2009-11-30T18:11:02+01:00
A = 9cm

V = 2 * a^3 * sqrt(2) / 12 = a^3 * sqrt(2) / 6
V = 729 * sqrt(2) / 6 cm^3

Pc = 2 * a^2 * sqrt(3) - 2 * a^2 * sqrt(3) / 4 = 3 * a^2 * sqrt(3) / 4
Pc = 243 * sqrt(3) / 4 cm^2