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r= 6:2=3
l=2πr
l=2π3
l=6π
l=6×3,14=18,84
P=πr²
P=π3²
P=9π
P=9×3,14=28,26
r=0.5*6=3
Obwód koła= 2Pi*r=2*3.14*3=18.84
d=6 P=? P=π(r²)
r=d÷2 l=? P=π(3²)
r=6÷2 P=9π
r=3 l=π×d
l=6π
p=9×3,14=28,26
l= 6×3,14=18,84