Recent content by mathwhizpro

I’m looking for this math tool. The purpose behind getting this will be a part of my high school trig lesson showing how I can find the height of an object using trig. I would love a large protractor like object like this but don’t even know what this one is called to search for one on amazon or...

Thank you for the suggestions!

I want to get a copy of historical Algebra literature that essentially the equivalent of Euclid’s Elements for Algebra. Does anyone have any recommendations?