Which device is used to measure angles in geometry?

When I was a little squirt, I had a little plastic protractor in my pencil case. I never used it for anything. When I took Geometry as a sophomore in high school, it was never introduced in class. 60 years later, it is still not necessary for anything. The thing was invented in 1589. It has since gone the way of the horse-and-buggy and spats.

✌️ thank you mister beck my 9th grade geometry teacher

Who, when & where invented it? More info...