Measurement of Angles

An angle is the region of the plane between two rays with common origin. The rays are called sides and have a common origin, the vertex.

An angle is positive if rotated in a counterclockwise direction and negative when rotated clockwise.

Angles are measured using the following units:

1.Sexagesimal degree (°)

If the circumference of a circle is divided into 360 equal parts, the central angle corresponding to each of its 360 parts is an angle of one degree sexagesimal, (1°).

A degree has 60 minutes (') and a minute has 60 seconds ('').

2. Radian (rad)

It is the measure of an angle whose arc is a radio.

2pi rad = 360°    

 pi rad = 180°

30ºflecha rad

Raidan Conversion

pi/3 rad flecha º

Degree Conversion