A regular socktagon.
A socktagon can be a ring with 8 sides where socks battle inside a drawer, or a sock with 8 sides.
The interior angle sum of a socktagon is 1080 degrees or 6π radians. The interior angle of a regular socktagon is 135 degrees or 3π/4 radians.
It is known to be the symbol of the Illshoeminhattie.