Circle Vocabulary

Front

What is the definition of a true circle?

Back

A set of points in a plane that are all the same distance from a given point, called the center.

Front

What is the term for the distance from the center of a circle to any point on its circumference?

Back

Radius

Front

What is the relationship between the radius and the diameter of a circle?

Back

The radius is half the length of the diameter.

Tags

CCSS.7.G.B.4

Front

What is the term for a line segment that connects two points on the circumference of a circle?

Back

Chord

Front

What is the term for the distance around a circle?

Back

Circumference

Front

What is the diameter of a circle?

Back

A line segment that passes through the center of the circle and has its endpoints on the circumference.

Front

What is a sector of a circle?

Back

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

Front

What is a segment of a circle?

Back

A region enclosed by a chord and the arc connecting its endpoints.

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where r is the radius.

Tags

CCSS.7.G.B.4

Front

What is the formula for the area of a circle?

Back

A = πr², where r is the radius.

Tags

CCSS.7.G.B.4