Normal set squares have two major problems:
Both of them should be solved with this 3D printable set square. It isn't undestroyable but its bending properties are by far better than those of bought set squares. Also it is by far cheaper. As I tried not to simply make a normal set square, I have got the idea to add slots to it. This solves the problem of the set square not being transparent and also allows you to draw lines without even moving the set square. The only problem with it is, that it may not be as exact as a normal set square. But this is only because the nozzle size limits the smallest details. The model is printable with a standard 0.4 mm nozzle.
Maybe a version with imperial units will follow. If you need an imperial version, send me a message and I will increase the priority of this task!!
IMPORTANT PRINTING TIPS:
The author marked this model as their own original creation.