# What is a 360 degree protractor called?

## What is a 360 degree protractor called?

The common protractor which is used in geometry is in the shape of a semicircle with markings of angles from 0° to 180° on it. There are other protractors that are circular in shape which can measure complete 360-degree angles. They are known as 360-degree protractors or full circle protractors. Important Angles of Trigonometry The special angles used in trigonometry are 0°, 30°, 45°, 60° and 90°. These are the common angles which are used while performing computations of trigonometric problems. The center arm of the device is the reference. Set the left arm at angle AB and the right arm at angle BC, and then holding the set angles in place, align the three arms to cross the three bodies sighted. The center of the protractor then marks your position. A 360-degree angle forms a circle. 540° is a full rotation of 360 degrees, plus an additional 180 degrees.

## What is a 360 degree protractor?

This Studymate 10cm 360 Degree Protractor is an easy solution to drawing and measuring circles. It is made from a sturdy plastic material and is clear so you can easily measure. This 360 degree protractor measures in millimetre increments. The common protractor which is used in geometry is in the shape of a semicircle with markings of angles from 0° to 180° on it. There are other protractors that are circular in shape which can measure complete 360-degree angles. They are known as 360-degree protractors or full circle protractors. We drew the angle on the protractor and used the protractor to help us work out that an angle which measures 140 degrees is an obtuse angle. It measures more than 90 degrees and less than 180 degrees.