Parts of a Circle Vocab

Front

What is a Tangent Line?

Back

A line that touches a circle at exactly one point.

Front

What is a Chord?

Back

A line segment whose endpoints lie on the circle.

Front

What is a Diameter?

Back

A chord that passes through the center of the circle, equal to twice the radius.

Front

What is a Radius?

Back

A line segment from the center of the circle to any point on the circle.

Front

What is a Secant?

Back

A line that intersects a circle at two points.

Front

What is the Circumference of a Circle?

Back

Front

What is an Inscribed Angle?

Back

An angle formed by two chords in a circle which have a common endpoint.

Front

How many points does a tangent intersect a circle?

Back

At only one point.

Front

What is the relationship between a radius and a diameter?

Back

The diameter is twice the length of the radius.

Front

What is the center of a circle?

Back

The point that is equidistant from all points on the circle.