Geometry, Theorems and Problems

Geometry, Theorems and Problems, Methodologies, Definitions, Software

Geometry, Theorems and Problems - Index 2

Euclidean Geometry

Triangles and Squares

Triangle and Squares.

Quadrilateral Index 

Quadrilaterals.

Parallelograms Index

Parallelograms Index.

Squares Index

Square.

Rectangle Index

Rectangle.

Rhombus, Rhombuses, Rhombi

Rhombus.

Trapezoid Index

Trapezoids.

Trapezoid median, Theorems and Problems, Index

Median of a Trapezoid, Theorems and Problems. Index.

Cyclic Quadrilateral Index

Cyclic Quadrilateral.
 

Ptolemy Theorem and Problems Index

Ptolemy's Theorems and Problems - Index.

Brahmagupta Theorem and Problems Index

Brahmagupta Theorem and Problems - Index
Brahmagupta (598–668) was an Indian mathematician and astronomer who discovered a neat formula for the area of a cyclic quadrilateral.

Tangential or Circumscribed Quadrilateral Index, theorems and problems

Tangential or Circumscribed Quadrilateral
 

Equilic Quadrilateral

Equilic Quadrilateral.
 

Complete quadrilateral

Complete Quadrilateral Index.
 

Polygons Index

Polygons.

Pentagon Index

Pentagons.

Heaxagons

Hexagons.

Heptagon index

Heptagons.

Octagon Index

Octagons.

Nonagon or enneagon

Nonagon or Enneagon.

Regular Decagon

Decagon. Theorems and Problems

Circles

Circles.

Centers

Triangle Centers.

Congruence

Congruence. Index.
 

Similarity

Similarity, Ratios, Proportions. Index.

Areas

Areas Index.

Geometria, Teoremas y Problemas

Geometria en Espanol, Teoremas y Problemas en Espanol.
(Spanish-language version)

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