#DIY This is part 2 of mathtoolz that I designed. These math tools are rule-shaped measuring 1.5" x 6". My ultimate goal was to create 3 of these rulers with different tools on them which cost literally cents to print. This tool has a protractor on it, along with important trigonometry equations to reference. I recommend printing this part at .1 mm layer height, as it needs as much detail as possible (I used .15 mm, which makes the lines on the protractor a little less visible). I also used PLA. Enjoy!