3 ms·

I'm pretty certain it's possible on the sphere, but I'm currently failing to demonstrate that with a pencil and a table tennis ball. Seems it should be possibl

I'm pretty certain it's possible on the sphere, but I'm currently failing to demonstrate that with a pencil and a table tennis ball. Seems it should be possible to draw the octagon that's shown in the article: draw a rectangle and flex the sides out a little bit.

gowld 6y ago
I'm not convinced. Flexing the sides requires negative curvature or non-convexity. Triangles are easy to draw because they have fewer sides than a square, thus positive curvature makes it possible to create a 3-right triangle. Octagons are the opposite.