Given a triangle ABC (see the dynamic figure
below) with the inside
equilateral triangles A_{2}BC, B_{2}AC, and C_{2}AB, then the lines AA_{2}, BB_{2}, and
CC_{2} are concurrent at a point F_{2}, 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.
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GeoGebra
GeoGebra is free and multiplatform dynamic mathematics software for all levels of education that joins geometry, algebra, tables, graphing, statistics and calculus
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been ported to HTML5. It has received several educational software awards in Europe and the USA.
