Oblicz pole koła o obwodzie 4PI cm
PI to liczba pi
L=2πr
4π=2πr
4=2r
r=2[cm]
P=πr²
P=2²π
P=4π[cm]
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L=2πr
4π=2πr
4=2r
r=2[cm]
P=πr²
P=2²π
P=4π[cm]