Circle Vocabulary

Front

A segment that passes through the center and has both endpoints on the circle is:

Back

Diameter

Front

Name the part shown in the given circle:

Back

Chord

Front

What unit of measurement is used for arc measure?

Back

degrees

Front

What is the term for the distance around a circle?

Back

Circumference

Front

The radius is ___________ the length of the diameter.

Back

half

Front

What is the distance from the center of the circle to any point on the circle called?

Back

Radius

Front

What is the term for a part of the circumference of a circle?

Back

Arc

Front

What do you call the area enclosed by two radii and the arc between them?

Back

Sector

Front

What is the formula for the circumference of a circle?

Back

C = 2πr or C = πd

Front

What is the relationship between the diameter and the radius?

Back

Diameter = 2 × Radius