Impossible Polygons Created 9 years ago2015-02-24 22:41:27 UTC by zeeba-G

Trying to imagine them hurts!

Does anyone know what the impossible polygon name is for a concave triangle? Imagine every line curving inward at the same radius. Look at my avatar for example, imagine the space between the three circles.

Sorry for starting such a weird thread but I thought it was pretty interesting and would like to know the name of this impossible polygon.

http://www.fabricsolutionsonline.com/concave-triangle-sign-purchase
half life 3 confirmed

Slightly related, if the sides curve the other way so each side is an arc with the centre at the opposite vertex, it's called a reuleaux triangle.It's an example of a cool type of shape called a curve of constant width.
They're interesting because no matter which way you measure it, it's always the same width like a circle. So solids based on it could be used as wheels or rollers.

For some reason that shape has always bothered me. I'm've don't know why.

Actually that shape is the basis of the Wankel engine.

Speaking of impossible geometry, I remember a documentary I saw some time ago... gonna try to find it and post it here.
[Edit]Taken down due to copyright infringement. Oh well.