PARTS OF A CIRCLE

Front

What is the definition of an Arc in a circle?

Back

An Arc is a portion of the circumference of a circle.

Front

What is a Radius?

Back

A Radius is a line segment from the center of the circle to any point on its circumference.

Front

Define Central Angle.

Back

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

Front

What is a Sector in a circle?

Back

A Sector is the region enclosed by two radii and the arc between them.

Front

What is a Chord?

Back

A Chord is a line segment whose endpoints lie on the circumference of the circle.

Front

Define Circumference.

Back

Circumference is the distance around the circle, calculated as C = 2πr, where r is the radius.

Front

What is a Diameter?

Back

A Diameter is a chord that passes through the center of the circle, equal to twice the radius.

Front

What is a Segment in a circle?

Back

A Segment is the region between a chord and the arc that connects the endpoints of the chord.

Front

What is a Point of Tangency?

Back

A Point of Tangency is the point where a tangent touches the circle.

Front

What is a Tangent?

Back

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