Central Angle Calculator

Enter the arc length and radius into the calculator to evaluate and determine the central angle of the circle contained in that arc.

Central Angle Formula

The following equation is used to calculate a central angle contained by a circular arc.

C = L / r

  • Where C is the central angle in radians
  • L is the arc length
  • r is the radius

FAQ

What is a central angle?

A central angle is an angle contained by a portion of an arc defined by an arc length and radius. It’s sometime referred to as the angel of rotation of an arc.

What is an arc length?

An arc length is the measure of the distance along an arc contained by a radius and angle.

central angle calculator

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