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r = 12 cm
α = 60 stopni.
Szukane:
Pole wycinka koła = ?
Rozw.:
Pα = α * πr² / 360
Pα = 60 * π* 12² / 360
Pα = 60 *144π / 360
Pα = 8640π / 360
Pα = 24π cm²
Odp.: Pole wycinka koła wynosi 24π cm².