A problem with equilateral triangles: What is it?
What if applet does not run?
A Mathematical Droodle
21 January 2016, Created with GeoGebra
Three equal equilateral triangles have one vertex at the center of a circle and the other two on its circumference. The midpoints of their sides on the circle form another equilateral triangle.
Copyright © 1996-2017 Alexander Bogomolny