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# Circle formulae

Circle formulae

Some circle formulae with simple calculator

1. Circumference $L=2 \pi R$
2. Area of a circle $S=\pi R^2$
3. Area of a sector $S=\frac{\alpha R^2}{2}$, where alpha - sector angle in radians

### Circle formulae

Digits after the decimal point: 2
Area of the circle

Area of the sector

Circumference