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Circles, sectors and arcs - EdexcelDifferent parts of a circle

The circumference of a circle is its outside edge, and is the same distance from the centre at every point along its length. This distance is called the radius. Learn how to measure and calculate these, along with the area and diameter of a circle.

Part ofMathsGeometry and measure

Different parts of a circle

Explore updated revision resources for GCSE Maths: Parts of a circle, with step-by-step slideshows, quizzes, practice exam questions, and more!

A chord is a straight line joining two points on the circumference of a circle.

An is a part of the circumference of a circle.

Circle with chord labelled

A segment is an area enclosed by a chord and an arc.

Circle with segment labelled

A sector is an area enclosed by two and an arc.

Circle with sector labelled

A tangent is a straight line which touches the edge of a circle once.

Circle with tangent labelled