pentagon a plane figure with five straight sides and five angles…

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

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

square a flat shape with four sides of equal length and four angles of 90°

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

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

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

tetrahedron in geometry, a tetrahedron, also known as a triangular pyramid, is a polyhedron composed of four triangular faces,...