Sector Area Calculator

Circle Sector Area

Calculate sector area and arc length from radius and central angle.

Method: The calculator treats the angle as a fraction of 360 degrees.

Understanding Sector Area

1. What This Calculator Measures

A sector is a slice of a circle defined by a radius and central angle.

2. How the Calculation Works

The calculator finds what fraction of a full 360-degree circle the angle represents, then applies that fraction to circle area and circumference.

3. Formula or Rule Used

sector area = angle / 360 x pi x r^2.

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