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 CircleThere are 360 degrees in a full rotation (a circle).
One degree is 1 ⁄ 360th 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 DegreesThe number of degrees in an angle can be measured directly using a protractor:
Alternatively, geometry and trigonometry can be used to find angles.
NoteWHAT IS AN ANGLE?
An angle is a measure of the rotation between two straight lines that share a common endpoint.
OTHER MEASURES OF ANGLESThe 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