# What Are Degrees? (Mathematics Lesson)

# What Are Degrees?

Degrees are a unit of measurement of an angle.There are 360 degrees in a full rotation.

Degrees are denoted by the symbol °.

# 360 Degrees in a Circle

There are 360 degrees in a full rotation (a circle).One degree is

^{1}⁄

_{360}

^{th}of a circle.

# Important Angles in Degrees

- 90° is a right angle, a quarter of a rotation.

- 180° is a straight angle, a half of a rotation.

- 270° is three quarters of a rotation.

- 360° is a full angle, a whole rotation.

# How to Measure an Angle in Degrees

The number of degrees in an angle can be measured directly using a protractor:Alternatively, geometry and trigonometry can be used to find angles.

##### Curriculum

##### Interactive Test

**show**

##### Note

**WHAT IS AN ANGLE?**

An angle is a measure of the rotation between two straight lines that share a common endpoint.

# OTHER MEASURES OF ANGLES

The radians is another measure of angles.1 radian is the angle found when the radius is wrapped around the circle.

There are 2π radians in one rotation.

Read more about radians