I made this protractor for you and me to use in the computer to make and measure angles in Illustrator or Photoshop, for example. Save it (right click, Save As), then open the file in your application. If you will be using it on an RGB document, you'll need to convert the protractor to RGB. In Photoshop or Elements, this is Image > Mode > RGB.
Drag it onto your new document and put your new layers on top of it. The center of the protractor is the top of the J. :)