How do you use a protractor to measure angles?

Answer 1

put the protractor on the vertex and look up at the degree's and look below

1. acute angle =has a measure between 0 degree's and 90 degree's
2. right angle =has a measure of 90 degree's
3. obtuse angle = has a measure between 90 degree's and 180 degree's
4. straight angle = has a measure of 180 degree's

that's how you use a protractor to measure angles.