Circle Vocabulary, Voice

Front

What is a Point of Tangency?

Back

A point where a tangent line touches a circle.

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 Central Angle?

Back

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

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 Center of a Circle?

Back

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

Front

What is Circumference?

Back

The distance around the circle, calculated as C = 2πr.

Front

What is a Chord?

Back

A line segment whose endpoints lie on the circle.

Front

What is a Major Arc?

Back

An arc that is larger than a semicircle.

Front

What is a Minor Arc?

Back

An arc that is smaller than a semicircle.

Front

What is a Tangent Line?

Back

A line that touches the circle at exactly one point.