## Rhombus / Rhombi Theorems and Problems - Index

Euclid's Elements Book I, 23 Definitions. One-page visual illustration.
Euclid's Elements Book. Index

Geometric Art: Rhombus. iPad Apps: fractBG.
Fractal Image with Rhombus.

Hexagons, Rhombus 60-120 degrees.

Rhombus Word Cloud. Geometry for Kids.

Triangle and Squares.

Durer's Pentagons and Rhombuses.
It is easy to see that two regular pentagons together with a 36° rhombus form an octagonal region that can tile the plane.

Dynamic Geometry 1470.
Tangential Quadrilateral, Incircles, Tangent, Parallel, Rhombus, Step-by-step Illustration.

Geometry Problem 1219
Equilateral Triangles, Midpoints, 60 Degrees, Congruence, Rhombus.

Geometry Problem 919.
Rhombus, Triangle, Perpendicular, 90 Degrees, Congruence.

Geometry Problem 749.
Triangle, Rhombus, Parallel, Harmonic Means, Metric Relations.

Proposed Problem 455.
Rhombus, Inscribed Circle, Angle, Chord, 45 Degrees.

Proposed Problem 359.

Proposed Problem 354.
Rhombus, Square, 45 degrees.

Proposed Problem 351.
Rhombus, Incircles, Common tangent, Circumscribable or Tangential quadrilateral.

Proposed Problem 219. Rhombus, Perpendiculars, Arithmetic Mean.

Proposed Problem 179. Rhombus, Square, Diagonal, Angle.

Generalizing Van Aubel: Michael de Villiers' Theorems.
Similar rhombuses or rhombi with centers E, F, G and H are constructed externally on the sides of quadrilateral

Hinged tessellation: Tessellation of squares and rhombuses or rhombi hinged at their vertices.

The Landscape of Geometry Terms.For right brain thinking (random, visual, subjective, emotional, holistic, intuitive,  creative, divergent..) with randomly selected terms, depending on size and location, and zoom.