Go Geometry Problems

Dynamic Geometry Problem 967: Three Equilateral Triangles, Midpoints. GeoGebra, HTML5 Animation for Tablets (iPad, Nexus). Levels: School, College, Mathematics Education

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The dynamic figure below shows equilateral triangles A1B1C1 and A2B2C2. If A, B, and C are the midpoints of A1A2, B1B2, and C1C2, prove that the triangle ABC is an equilateral triangle.

Dynamic Geometry of Problem 967
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 967: Three Equilateral Triangles, Midpoints. GeoGebra. HTML5 Animation for Tablets
 


 

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