Apps for making geometric shapes (math)
Grapher.app

You might want to take a look at /Application/Utilities/Grapher.app. It is a graphical calculator that can create 2D and 3D shapes.

x2y2z2=42



Here is a starters tutorial that looks fine: http://computers.tutsplus.com/tutorials/getting-started-with-grapher-your-macs-built-in-graph-tool--mac-48440