Circle Vocabulary, Angles and Arcs

Front

What is the point at which a tangent line intersects a circle called?

Back

Point of tangency.

Front

What is an inscribed angle?

Back

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

Front

What is a tangent line?

Back

A line that touches a circle at exactly one point.

Front

What is a diameter?

Back

A special chord that passes through the center of the circle.

Front

What is a minor arc?

Back

An arc that is smaller than a semicircle.

Front

What is a chord?

Back

A line segment whose endpoints lie on the circle.

Front

What is a secant?

Back

A line that intersects a circle at two points.

Front

What is a central angle?

Back

An angle whose vertex is at the center of the circle and whose sides are radii.

Front

What is the relationship between a diameter and a chord?

Back

A diameter is the longest chord in a circle.

Front

How do you identify a minor arc?

Back

By naming the two endpoints of the arc.