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obwod 2pir 2*pi*6=12pi
r=a√3/6
r=12√3/6
r=2√3
P=(2√3)²π
P=12π
L=4√3π
Okrąg opisany
R=a√3/3
R=12√3/3
R=4√3
P=(4√3)²π
P=48 π
L=8√3ππ