Geometry classes, Problem 245. Parallelogram with Equilateral triangles. Congruence. Elearning.

Problem 245. Parallelogram with Equilateral triangles. Congruence

In the figure, equilateral triangles BCE and CDF are constructed on the sides BC and CD of a parallelogram ABCD. Prove that AEF is an equilateral triangle. Post a comment.

Elearning 245: Parallelogram and equiilateral triangles

Auxiliary Line: A line, ray, or segment added to a diagram to help in a proof or solution.

See also:

Equilateral Triangle
Parallelogram

Elearning 245: Parallelogram