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D = a√3 = 3
a = 3 / √3 = √3
Pc = 6 * a² = 6 *3 = 18
2.
Pc = 6a² = 24
a² = 4
a = 2
V = a³ = 8
d = a√2
d = 3
3= a√2 /:√2
3 : √2 = a
więc,
P = (3:√2) ×2
P = 6: 2√2 cm ²
2.
P = 24 cm ²
P = 6 × a²
24 = 6 × a² /: 6
4 = a² / √
2 = a
w sześcianie V = a³
V = 2³
V = 8cm³