In geometry, a protractor is a circular or semicircular tool for measuring an angle or a circle. The units of measurement utilized are usually degrees.
You can draw any angle with the aid of a protractor. But make sure that you measure the angle from line A-A and not from line B-B.
The protractor is also used to set angle on a sliding bevel.
A simple and inexpensive protractor such as is used in schools should be suitable for most projects. Bear in mind, however, that the larger the protractor, the more accurate the measurements are likely to be.