Circle formulas

Circle formulas

Some circle formulas 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
    PLANETCALC, Circle formulae

    Circle formulae

    Digits after the decimal point: 2
    Area of the circle
    Area of the sector

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