Arcs and Angles Circles

Front

What is an arc in a circle?

Back

An arc is a part of the circumference of a circle.

Front

What is the measure of a full circle in degrees?

Back

360 degrees.

Front

What is an angle?

Back

An angle is formed by two rays with a common endpoint called the vertex.

Front

What is the measure of a right angle?

Back

90 degrees.

Front

What is the relationship between the central angle and the arc it subtends?

Back

The measure of the arc is equal to the measure of the central angle.

Front

What is a chord in a circle?

Back

A chord is a line segment whose endpoints lie on the circle.

Front

What is the measure of arc AB if the central angle is 142 degrees?

Back

142 degrees.

Front

What is the measure of angle QRP if it is given as 23 degrees?

Back

23 degrees.

Front

What is the measure of arc WYZ if it is given as 231 degrees?

Back

231 degrees.

Front

What is the measure of angle JML if it is given as 94 degrees?

Back

94 degrees.