Geometry Problem 1283
Elements: Two Equilateral Triangle, Perpendicular, Midpoint.
In an equilateral
triangle ABC, CDE is a line through C so that AD and BE are perpendicular
to CDE, as shown in the figure. If M is the midpoint of AB, prove that the
triangle MDE is equilateral.
See also:
Geometry Problems
1281-1290
Visual Index
Open Problems
All Problems
Triangle
Equilateral Triangle
Midpoint
Perpendicular lines