Google text docs has an equation editor but no dice for Google Presentation or Google Draw. (which by the way you can insert Google Draw into text doc, presentation and spreadsheet!)
As a Geometry teacher I need my drawings to have the degree symbol and I’m tired of drawing the little circle and placing it.
Do a Google search for HTML degree symbol and go to a website like this: http://www.ascii.cl/htmlcodes.htm or http://htmlhelp.com/reference/html40/entities/symbols.html
Copy the degree or whatever symbol you want you want right into the Google Draw text box you are creating. Problem solved.