Oblicz pole koła o obwodzie 43 \pi m
O=2πr
O=43πm
43π=2πr /:π
43=2r /:2
21,5=r
r=21,5m
P=πr²
P=π*(21,5)²=462,25πm²
P=462,25πm²
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O=2πr
O=43πm
43π=2πr /:π
43=2r /:2
21,5=r
r=21,5m
P=πr²
P=π*(21,5)²=462,25πm²
P=462,25πm²