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a = 30 m
H = 20 m
Szukamy:
Pb = ?
V = ?
Pb = 4 · PΔ
Pb = 4 ·
Wysokość(h) obliczam z twierdzenia pitagorasa:
a²+b²=c²
h² + (
20² + (
h² = 400 + 225
h² = 625 /√
h = √625
h = 25
Pb = 4 ·
Pb = 1500 m²
V =
Pp = 30 ·30
Pp = 90 m²
V =
V = 30 ·20
V = 60 m³
Odpowiedź: Powierzchnia ścian bocznych piramidy to 1500 m², a jej objętość to 60 m³.