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a=8
Pole koła opisanego:
r=a√3/3=8√3/3
P=πr²=π(8√3/3)²=21⅓π(cm²)
Pole koła wpisanego:
r=a√3/6=8√3/6=4√3/3
P=πr²=π(4√3/3)²=5⅓π(cm²)
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