# Circle sector

A circle sector is a part of circle defined by the circle’s periphery (the edge) and an angle formed by two radiuses.

## Arc length

Use the following formula to calculate the arc length:

Where θ is the angle at the center point in radians and r is the radius.

## Area

The area of the circle sector can be calculated with the formula:

where θ is the angle at the center point in radians and r is the radius.

## Calculate area and arc length of a circle sector

 Radius (r): Angle (θ) in radians: