Question

I don’t know how to use a protractor

Answer 1

First, set the mid point of the protractor on the vertex of the angle you want to measure. Then line up one of the sides of the angle with the zero line on the protractor. Lastly, read the degree where the other side crosses into the number scale. Note that a protractor has two sets of numbers and the side on which you measure the angle decides which side you read the protractor from.<span />