PARTS OF A CIRCLE

Front

What is the diameter of a circle?

Back

The diameter is a straight line that passes through the center of the circle and connects two points on its circumference. It is twice the length of the radius.

Front

What is a chord in a circle?

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 sector of a circle?

Back

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

Front

What is a segment in a circle?

Back

A segment is the area enclosed by a chord and the arc connecting the endpoints of the chord.

Front

What is a minor arc?

Back

A minor arc is an arc that is smaller than a semicircle.

Front

What is a major arc?

Back

A major arc is an arc that is larger than a semicircle.

Front

What is a tangent to a circle?

Back

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

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 radius?

Back

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