Kinematic method: Equilateral triangles on parallelogram

Two equilateral triangles are constructed on two adjacent sides of a parallelogram. Prove that an equilateral triangle is formed by the outside vertices of the triangles and the vertex of the parallelogram that is not part of the equilateral triangles.

 

alfinio

 
Material Type
Activity
Tags
kinematic  method  equilateral  triangles  parallelogram 
Target Group (Age)
19+
Language
English (United States)
 
 
GeoGebra version
4.0
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1511
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