In the video she mentions there are only 17 different wallpaper designs. As it turns out, there are only 17 possible planar symmetry groups [1]. [1] https://en

In the video she mentions there are only 17 different wallpaper designs. As it turns out, there are only 17 possible planar symmetry groups [1]. [1] https://en.wikipedia.org/wiki/Wallpaper_group https://en.wikipedia.org/wiki/Wallpaper_group