Online Geometry

Dynamic Geometry Problem 904: Second Fermat Point. Triangle, Equilateral triangles, Concurrent lines, GeoGebra, HTML5 Animation for Tablets (iPad, Nexus). Levels: School, College, Mathematics Education

Given a triangle ABC (see the dynamic figure below) with the inside equilateral triangles A2BC, B2AC, and C2AB, then the lines AA2, BB2, and CC2 are concurrent at a point F2, called the Second Fermat point.
See also the static diagram of the Second Fermat point


Dynamic Geometry Environment (DGE) or Interactive Geometry Software (IGS) of the Second Fermat Point

The interactive demonstration above was created with GeoGebra.

To stop/play the animation: tap the icon in the lower left corner.
To reset the interactive figure to its initial state: tap the icon in the upper right corner.
To manipulate the interactive figure: tap and drag points or lines.
  

GeoGebra
GeoGebra is free and multi-platform dynamic mathematics software for all levels of education that joins geometry, algebra, tables, graphing, statistics and calculus application, intended for teachers and students. Many parts of GeoGebra have been ported to HTML5. It has received several educational software awards in Europe and the USA.
 

  Dynamic Geometry Problem 904: Second Fermat Point. Triangle, Equilateral triangles, Concurrent lines, GeoGebra, HTML5 Animation
 


 

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