Pole koła o promieniu r=9cm
P=π r² = π * (9cm)² = 81 π cm²
P₁ - pole wycinka kołowego
P₁ / P = 120°/360°
P₁ / 81πcm² = 1/3
P₁ = 1/3 * 81π cm² = 27 π cm²
pole wycinka
P=alfa/360*Pi*r^2=120/360*Pi*9^2
P=27 Pi cm2
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Pole koła o promieniu r=9cm
P=π r² = π * (9cm)² = 81 π cm²
P₁ - pole wycinka kołowego
P₁ / P = 120°/360°
P₁ / 81πcm² = 1/3
P₁ = 1/3 * 81π cm² = 27 π cm²
pole wycinka
P=alfa/360*Pi*r^2=120/360*Pi*9^2
P=27 Pi cm2