This is the only one of these that looked interesting enough to put on here. It is an Excel spreadsheet containing interactive 2D and 3D shapes which demonstrate my knowledge of matrix calculations and ways of projecting 3D shapes onto the screen.
Here I chose a hexagon as my shape which can be manipulated by translation, rotation, reflection, scale, and shear using the buttons or checkmarks.
On this one, you can see a deformed octahedron. It can be manipulated similarly to the one before, however, you can also change the properties of the projection matrices to achieve different results. Moreover, I also had to calculate the outward normals of the faces as well as the average unit normal at a specific vertex.
You can also see some collision calculations on the 3rd page, but that's kinda boring. Viewing the project on Google Docs breaks the graphs - Excel works fine.