What is a protractor?
A protractor is an instrument used to measure angles.
You may well have used them in your mathematics lessons.
Angles are measured in degrees. There are 360 degrees in a full circle.
Many protractors are a semi-circular shape made from plastic...
...and can measure up to 180 degrees.
However, it is possible to buy protractors which measure up to a full 360 degrees.
In construction, protractors can be found as a part of several tools, including: