Circle Terminology

Front

What is the measure of angle ACB in a circle if it is given as 22.5°?

Back

m∠ACB = 22.5°

Front

What is the measure of arc AB if it is given as 68?

Back

Measure of arc AB = 68

Front

This is a picture of ___________.

Back

Radius

Front

A chord is ...

Back

a line that has endpoints on the circle.

Front

This is a picture of ___________.

Back

Semi-Circle

Front

What is the definition of a circle?

Back

A circle is a set of points in a plane that are equidistant from a fixed point called the center.

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where r is the radius.

Front

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

Back

The diameter is twice the length of the radius (d = 2r).

Front

What is an inscribed angle?

Back

An inscribed angle is formed by two chords in a circle which have a common endpoint.

Front

What is the measure of a central angle in relation to the arc it intercepts?

Back

The measure of a central angle is equal to the measure of the arc it intercepts.