Humans can understand the world in all its complex 3D glory, from the subtle curve of rolling hills to the jarring harsh lines of Brutalist architecture. But anyone who's ever played a video game will know that computers love to think about 3D in triangles. Why is that?

This video by Computerphile explains how triangles turn out to be the perfect shape for approximating any 3D surface—in fact, it does a better job than any other shape you can think of. [Computerphile]