How would you describe the phenomenon dynamically being illustrated below? How can we formally prove this true?
For more information, see this [url=http://www.gogeometry.com/school-college/1/p1007-hexagon-midpoint-triangle-median-centroid-concurrency-math.htm]post by Antonio Gutierrez[/url] ([url=http://gogeometry.com/]GoGeometry[/url]).