Geometry

hendecagon

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

octagon

octagon a plane figure with eight straight sides and eight angles…

Voronoi diagram

Voronoi diagram is the division of a space into contiguous neighbouring cells. The cells relate to a set of points ( Voronoi sites) in that...

icosagon

icosagon or 20-gon, is a twenty-sided polygon. The sum of any icosagon’s interior angles is 3240 degrees.

Weaire-Phelan model

Weaire-Phelan model the Weaire–Phelan structure is a complex 3-dimensional structure representing an idealised foam of equal-sized bubbles…

Amman tiling

Amman tiling is an aperiodic set of two tiles and a foursome of ‘golden rhombohedra’, which form aperiodic tilings in three dimensions. The best-known Ammann...

triangle

triangle a flat shape with three straight sides…

annulus

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

shape

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

THEORIA