Answer with Explanation
A protractor is a tool used to measure and draw different angles. It is shown on protector from 0 degree to 180 degree to make an angle. Suppose you have to make an angle of 30 degree, first make a horizontal line of given length then, out protector at the endpoint of a line straight. This means to drown line is just on 0 degrees line then, check where the 30 degrees is put the mark and draw line join from where you put the protector untill where you put a mark. This is a process of use of a protector.