srednica = 20 m
promien = srednica/2 = 20/2 = 10 m
P=πr²=π*(10m)²=100πm² = (100*3,14)m² ≈ 314 m²
odp:
ma ok. 314 m²
srednica 20m
promień r=1/2*20m=10m
P=πr²
P=π10²m²
P=100πm²
π≈3,14
p≈3,14*100m²
P≈314m²
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srednica = 20 m
promien = srednica/2 = 20/2 = 10 m
P=πr²=π*(10m)²=100πm² = (100*3,14)m² ≈ 314 m²
odp:
ma ok. 314 m²
srednica 20m
promień r=1/2*20m=10m
P=πr²
P=π10²m²
P=100πm²
π≈3,14
p≈3,14*100m²
P≈314m²