Parts of a Circle Vocab

Front

What is a Chord?

Back

A chord is a line segment with both endpoints on the circle.

Front

What is a Diameter?

Back

A diameter is a chord that passes through the center of the circle, dividing it into two equal halves.

Front

What is a Radius?

Back

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

Front

What is a Point of Tangency?

Back

A point of tangency is the point where a tangent line touches the circle.

Front

What is a Central Angle?

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides are radii.

Tags

CCSS.HSG.C.A.2

Front

What is an Inscribed Angle?

Back

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

Front

What is a Tangent Line?

Back

A tangent line is a straight line that touches the circle at exactly one point.

Front

What is a Sector?

Back

A sector is a region of a circle bounded by two radii and the arc between them.

Front

What is an Arc?

Back

An arc is a part of the circumference of a circle.

Tags

CCSS.HSG.C.B.5

Front

What is a Circumscribed Angle?

Back

A circumscribed angle is an angle formed outside the circle by two tangents.