I have a friend who is a high school math teacher and I was talking to them about how linear algebra and trigonometry are crucial to 3D graphics and rendering.

I have a friend who is a high school math teacher and I was talking to them about how linear algebra and trigonometry are crucial to 3D graphics and rendering. I told them how going from a set of vertices of a cube to showing several cubes in different orientations and positions on a screen is mostly just a series of matrix multiplications, and why the geometric properties of a triangle make it the ideal primitive to use for rendering. The details about computer graphics and such was new to them, but very quickly it made sense to them (mathematically). Later on when they had started a section in their class about triangles they used al this to illustrate and relate the subject to something they were all familiar with.