Oblicz, jaki promień ma koło o polu 400 m kwadratowych.
P=400m²πr²=400 /:πr²=400/πr=√400/√πr=20/√π całość razy √πr=(20√π)/π (m)
:)
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P=400m²
πr²=400 /:π
r²=400/π
r=√400/√π
r=20/√π całość razy √π
r=(20√π)/π (m)
:)