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s=100 m
s=25l =50πr
πr=2m
r=2/π
r=2/3,14 m
r=0,637 m
2pi * r = 4m
6.28 * r = 4m |/6.28
r = 4m/6.28
r = 0.637m
Odpowiedź: Promień tego koła jest równy 0.637m.
2*pi*r=4
3.14*r=2
r~0.63