Mathe (Subject) / Kreis-Formeln (Lesson)
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- Durchmesser d=U÷pi
- Umfang U=pi(×)2r
- Flächeninhalt A=pi(×)r2
- Flächeninhalt eines Kreisringes A=pi(×)(r22-r12)
- Länge des Kreisbogens bα=pi×2r×α 360
- Flächeninhalt eines Kreisausschnittes Aα=pi×r²×α 360 360×A=α pi×r²