Components of a Circle

Front

What is a Secant in a circle?

Back

A line that intersects a circle at two points.

Front

What is the diameter of a circle?

Back

The longest chord of the circle, passing through the center, and is twice the length of the radius.

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 its circumference.

Front

What is an Arc in a circle?

Back

A portion of the circumference of a circle.

Tags

CCSS.HSG.C.B.5

Front

What is a Central Angle?

Back

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 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 the relationship between diameter and radius?

Back

The diameter is twice the length of the radius.

Tags

CCSS.7.G.B.4

Front

What is a Sector in a circle?

Back

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

Front

What is the Circumference of a circle?

Back

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

Tags

CCSS.7.G.B.4