Degrees and radians are units of angle. A brief introduction to degree and radian measure is as follow:

Degrees:

• A degree is an angle measurement equal to 1/360 of a circle, Number 360 has 24 divisors.

• A degree is the accepted SI unit of an angle for use with the metric system.

• A degree can be abbreviated as ‘deg’. For example 1 degree can be written as 1 deg.

• Protractors are mostly used in measuring the angles in degrees. They are semi-circle or full circle devices with the degree marks allowing users to measure an angle in degrees.

Radians:

• A radian is the angle from the start and end of the circle or an arc divided by the radius of the circle or arc.

• One radian is equal to 180/π , which is approximately 57.29578 deg. There are approximately 6.28318 radians in a circle.

• The radian is the SI derived unit for angle in the metric system.

• Abbreviation for radian is ‘rad’. For example, 2 radian can be written as 2 rad.

• Pi radians are equal to 180 degrees:

π rad=180 deg

• one degree is equal to 0.01745329252 radians:

1 deg =0.01745329252 rad