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 in geometry?

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 measure of a straight angle?

Back

180 degrees.

Front

What is a central angle?

Back

A central angle is an angle whose vertex is at the center of the circle.

Front

How do you find the measure of an arc?

Back

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

Front

What is the relationship between arcs and angles in a circle?

Back

The measure of an arc is directly related to the angle that subtends it.

Front

What is a minor arc?

Back

A minor arc is an arc that is less than 180 degrees.

Front

What is a major arc?

Back

A major arc is an arc that is more than 180 degrees.