triangle

hendecagon undecagon, endecagon, or 11-gon is an eleven-sided polygon. A regular hendecagon has internal angles of 147.27 degrees...

ellipse a curve in a plane surrounding two focal points such that the sum of the distances to the...

oval having a rounded and slightly elongated outline or shape like that of an egg.

annulus or little ring, is a ring-shaped object, a region bounded by two concentric circles...

arbelos is a plane region bounded by three semicircles connected at the corners, all on the same side of...

shape the external form, contours, or outline of something...

Amman tiling is an aperiodic set of two tiles and a foursome of ‘golden rhombohedra’, which form aperiodic tilings...

Archimedean spiral The Archimedean spiral, or arithmetic spiral, is a spiral named after the 3rd century BC Greek mathematician...