Circle Terminology

Front

What is a Tangent Line?

Back

A line that touches a circle at exactly one point without crossing it.

Front

What is a Secant?

Back

A line that intersects a circle at two points.

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, dividing it into two equal halves.

Tags

CCSS.HSG.C.A.2

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 Minor Arc?

Back

An arc that is smaller than a semicircle.

Front

What is a Major Arc?

Back

An arc that is larger than a semicircle.

Front

What is a Semi-Circle?

Back

An arc that represents half of a circle.

Front

What is a Central Angle?

Back

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

Tags

CCSS.HSG.C.A.2

Front

What is an Inscribed Angle?

Back

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