Triangle -- from Wolfram MathWorld

Penrose Tiles -- from Wolfram MathWorld

Archimedean Graph -- from Wolfram MathWorld Geometry art, Sacred geometry art, Sacred geometry

Augustinlouis Cauchy, Wolfram Mathematica, mathworld, tensor, tetrahedron, Normal, stress, Surface, plane, Mathematics

Regular Tetrahedron with a square inside it -- from Wolfram MathWorld

Parallelian -- from Wolfram MathWorld

Cevian Triangle -- from Wolfram MathWorld Euclidean geometry, Plane geometry, Learning tools

Schematic plot of banana trees (adapted from Wolfram MathWorld).

Mathworld - Wolfram.com LegendreDifferentialEquation PDF, PDF, Equations

Circle Inscribing -- from Wolfram MathWorld