I have a new project I'm working on, but I needed to have an idea of the angles involved. I couldn't find a protractor, so I made one. :)

The protractor has two sets of angle-finders, an inner and an outer ring. The marks on each ring are 10 degrees apart. The two rings are set 5 degrees from one another.

If you require a greater degree of measurement, you could always edit the OpenSCAD file to include finer gradations. For my purposes, this worked really well.

Print instructions

Instructions

1. Print.
2. Measure stuff.
3. Profit!