
Dynamic Geometry or Interactive Geometry
Software
are computer programs which allow
one to create and
then manipulate geometric
constructions.


First AjimaMalfatti Point
Animated illustration. 

Second AjimaMalfatti Point
Interactive illustration. 

Apollonius' Problem for Three Circles
Interactive illustration.


Dynamic Geometry Software: GeoGebra
4.2 Help Document
GeoGebra is a dynamic geometry software. Constructions can be made with points, vectors, segments, lines, polygons, conic sections, and functions.
Interactive Mind Map 

Bottema's Theorem.
Invariance of an isosceles right triangle.
Triangle and Squares with Interactive Geometry Software
StepbyStep construction, Manipulation, and animation. 

Complete Quadrilateral: OrtholineSteiner Line.
StepbyStep construction, Manipulation, and animation
Dynamic Geometry Software. 

EightPoint Circle Theorem
StepbyStep construction, Manipulation, and animation.
Dynamic Geometry. 

Equal Incircles Theorem. Interactive. 

Eyeball Theorem:
Animated Angle to Geometry Study.


Feuerbach Points and NinePoint Circle with interactive
animation, manipulation, and stepbystep construction.
Incenter, Incircle, Excircles. 

Four Circles Theorem Using Interactive Dynamic Software
StepbyStep construction, Manipulation, and animation. 

Interactive
Gergonne Line and Nobbs Points.
Dynamic Geometry.
StepbyStep construction, Manipulation, and animation. 

Interactive Hinged tessellation. Square tessellation  Dynamic Geometry.
C.a.R. (Compass and Ruler). This Java
applet requires Java 1.3 or higher. 

Screencast Tutorial: Interactive Square Hinged Tessellation.
C.a.R. (Compass and Ruler). 

Incenter, Excenter, Incircle, Excircle Using TracenPoche Dynamic
Software
StepbyStep construction, Manipulation, and animation. 

IsogonicJacobi
Theorem: Using TracenPoche Dynamic
Geometry Software 

Lemoine Line Theorem,
Interactive illustration.
HTML5 Animation for iPad and Nexus
Adobe Flash Animation 

Marion
Walter's Theorem: Triangle and Hexagon areas:
Using TracenPoche Dynamic Geometry Software 

Miquel's Pentagram Theorem
Interactive proof with animation and key theorems.

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