Circle Vocabulary

Front

What is AB?

Back

Diameter

Front

A segment that touches the circle only once.

Back

Tangent

Front

The radius of a circle is:

Back

The measurement from the center of a circle to an edge of the circle.

Front

What is this called?

Back

Diameter

Front

An angle whose vertex is the center of a circle is a(n) ______.

Back

Central angle

Front

What is the distance around a circle called?

Back

Circumference

Front

A line segment whose endpoints lie on the circle is called a ______.

Back

Chord

Front

What is the longest chord in a circle?

Back

Diameter

Front

What do you call a line that intersects a circle at two points?

Back

Secant

Front

What is the term for an angle formed by two radii of a circle?

Back

Central angle