Parts of a Circle

Front

What is a Secant?

Back

A line that intersects a circle at two points.

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 Chord?

Back

A line segment whose endpoints lie on the circle.

Front

What is a Tangent?

Back

A line that touches the circle at exactly one point.

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 Semicircle?

Back

An arc that represents half of a circle.

Front

What is the Center of a Circle?

Back

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

Front

What is the Diameter?

Back

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

Front

What is the Circumference?

Back

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