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a = ½πr
πr²/a² = πr²/¼π²r² = 4/π
Odp. Stosunek ich pól wynosi 4/π
r- promień koła
4a= 2πr
πr²:a²= πr²: (πr/2)²= 4:π
stosunek to 4:π
a= πr/2
P Koła = πr²
P Kwadratu a²
pole kwadratu /pole koła = (π²r²*1/4)/πr² = π/4