Circle Vocabulary

Front

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

Back

Major Arc

Front

When the distance from one point to the next on the circle is exactly 180° (half of a circle).

Back

Semi-Circle

Front

This is a picture of ___________.

Back

Diameter

Front

This is a picture of ___________.

Back

Semi-Circle

Front

What is this called?

Back

Tangent Line

Front

A line segment whose endpoints lie on the circle.

Back

Chord

Front

A line that touches the circle at exactly one point.

Back

Tangent Line

Front

A line that intersects the circle at two points.

Back

Secant

Front

The distance from the center of the circle to any point on the circle.

Back

Radius

Front

The longest chord of a circle, passing through the center.

Back

Diameter