Protractor Support

This link gives an angle and already has the protractor set properly on the vertex. https://www.mathplayground.com/measuringangles.html

Read a very basic protractor to choose the correct angle. http://toytheater.com/quarterback/

Friendly aliens have lost their way and you are in charge of the rescue mission. Your job is to set the angle on the rescue launcher. Can you estimate the angles within 5 degrees? https://www.mathplayground.com/alienangles.html