Geometry, Level: College, High School - Table of Content

Problems and solutions.

Geometry Problem 930.
Acute Triangle, Altitudes, Circles, Diameter, Angle, Measure.

Geometry Types, Methodologies, Terminologies
Interactive Mind Map and News.

Definitions.

Points, Theorems and Problems - Index.

Angles. Theorems and Problems.

Lines: Parallel, Perpendicular, Concurrent, Transversal, Collinear Points, Midpoints

Triangles:
Equilateral, Isosceles, Right Triangle, Obtuse Triangle

Quadrilaterals:
Parallelogram, Square, Rectangle, Rhombus, Trapezoid

Polygons:
Pentagon, Hexagon, Heptagon, Octagon, Nonagon or Enneagon

Circles:
Intersecting Circles, Tangent Circles, Intersection of a Line with a Circle

Triangle Centers:
Centroid /Barycenter, Circumcenter, Incenter, Excenter, Orthocenter

Congruence
 

Similarity, Ratios, Proportions.
Metric Relations in a Right Triangle

Areas:
Triangle, Square.

Classical Theorems

Solid Geometry.

Geometry Art Problems Gallery Index

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

Euclid's Elements Book. Index

Geometry for Children.

Dynamic Geometry.