podaj stosunek pola koła o promieniu 3r do pola koła o promieniu r
P1=πr²
P2=π·(3r)²=9πr²
P2/P1=9πr²/πr²=9/1
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P1=πr²
P2=π·(3r)²=9πr²
P2/P1=9πr²/πr²=9/1