Circle Vocabulary (No Pictures)

Front

The long way around a circle that is greater than 180°.

Back

Major Arc

Front

The distance from the center of a circle to the boundary of a circle (half of the diameter).

Back

Radius

Front

An angle whose vertex (corner) is at the center of the circle.

Back

Central Angle

Front

A segment/chord that runs through the center of the circle (the longest chord).

Back

Diameter

Front

A segment with 2 endpoints on the circle.

Back

Chord

Front

The shortest distance between two points on a circle.

Back

Minor Arc

Front

An angle formed by two chords in a circle that share an endpoint.

Back

Inscribed Angle

Front

A line segment that connects two points on a circle but does not pass through the center.

Back

Chord

Front

The total distance around the circle.

Back

Circumference

Front

The area contained within a circle.

Back

Circle Area