Circles Vocabulary Review

Front

What is a tangent line of a circle?

Back

A line that touches the circle only once.

Front

What is the radius of a circle?

Back

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

Front

What is an inscribed angle?

Back

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

Front

What is the relationship between an inscribed angle and the intercepted arc?

Back

The inscribed angle is half of the intercepted arc.

Front

What is the diameter of a circle?

Back

The measurement across the circle through the center, equal to two times the radius.

Front

What is the circumference of a circle?

Back

The distance around the circle.

Front

What does it mean for a point to be on the circle?

Back

The point lies exactly on the boundary of the circle.

Front

What does it mean for a point to be inside the circle?

Back

The point lies within the boundary of the circle.

Front

What does it mean for a point to be outside the circle?

Back

The point lies outside the boundary of the circle.

Front

What is a chord in a circle?

Back

A line segment whose endpoints lie on the circle.