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

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

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