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2009-12-15T09:43:09+01:00
1.
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
7 4 7
2009-12-15T09:57:25+01:00
1.
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

4 2 4