Online Geometry

Online Geometry: Triangle Centers, Theorems and Problems Index, Page 4

Triangle Centers - Table of Content 4

The School of Athens

Proposed Problem 79: Triangle. Similarity, Altitudes, Orthocenter, Incircles, Inradii.

Interactive Orthopole of a Triangle: Using TracenPoche Dynamic Geometry Software, Online Step-by-Step construction, manipulation, and animation.

Morley's Triangle & Center: with interactive animation and manipulation.

Schiffler Point: Four Euler Lines with interactive animation and manipulation.

Proposed Problem 68

Proposed Problem 68: Triangle, Incircle, Inradius, Tangent, Similarity.

Proposed Problem 67: Triangle, Circumcircle, Angles, Cyclic Quadrilateral.
 

Proposed Problem 66: Triangle, Excircle, Tangents, Geometric Mean.
 

Proposed Problem 64: Triangle, Incircle, Transversal.

Incenter, Excenter, Incircle, Excircle Using TracenPoche Dynamic Software
Step-by-Step construction, Manipulation, and animation.

Three Tangent Circles Theorem Using TracenPoche Dynamic Software
Step-by-Step construction, Manipulation, and animation.

Sangaku Geometry Theorem: Cyclic Quadrilateral. Inradii, Rectangle.

Sangaku Problem (An Old Japanese Theorem). Inradii, Carnot's theorem.

Triangle Centers. Word find puzzle.

Proposed Problem 52: Triangle, angles, incircle.

Feuerbach Theorem
One of the most striking theorems in triangle geometry.

Feuerbach Points and Nine-Point Circle with interactive animation, manipulation, and step-by-step construction.

Feuerbach Point Facts
 

Feuerbach Theorem, Acute Triangle illustration
 

Feuerbach Theorem, Obtuse Triangle illustration
 

Feuerbach Theorem, Right Triangle illustration
 

Proposed Problem 51: Fagnano's Problem
Inscribed Triangle with the Minimum Perimeter.

Proposed Problem 40.
Triangle, Incenter, Excenter, Angles 80, 40, Distances.

Proposed Problem 40. Geometry Help.
 

Proposed Problem 39.
Triangle, Incircle, Bisector, Cyclic Quadrilateral and angles.

Proposed Problem 39 Geometry Help.
Facts you should know for the proposed problem 39.

Proposed Problem 38.
Right Triangle, altitude, incircles, incenters, and angles.

Proposed Problem 37.
Right Triangle, altitude, incircles, incenters, and orthocenter.

Proposed Problem 36.
Right Triangle, altitude, incircles and inradii.

Lemoine Theorem

Triangle and Squares 17

Triangle and Squares 16

Sawayama -Thebault's theorem

Proposed Problem 34.
Right triangle, cevian, incircles, tangents and inradius.

Go to Page: Previous | 1 | 2 | 3 | 4 | 5 | Next

 

Home | Sitemap | SearchGeometry | Email | by Antonio Gutierrez