Question

Jakie jest pole koła o obwodzie C?

Answer 1

2Πr= c
r= c/2Π

Πr² = Π (c/2Π)² =Π c²/4Π² = c²/4Π

Answer 2

2*pi*r= C
r= C/2*pi

P=pi*r² = pi*(C/2*pi)² =pi*C²/4*pi² = C²/4*pi

Answer 3

P=πr2
L=2 πr
L=C
2πr=C/2π
r=C/2π
P= π(C/2π) 2
P= π* C 2/4 π2
P= π C 2/4 π2