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1. przekatna podstawy ostr. d=a√2
d=6√2
2. Z pitag. licze wys. ostrosł
(3√2)²+H² = 5²
H² = 25 - 18
H = √7cm
3. V ostr
V = ⅓×6×6√7 = 12√7
4. V szesc.
V = a³
V = 6³ = 216cm³
5. V bryły
V = 12√7 +216 cm³