Geometry classes, Problem 242. Triangle with Equilateral triangles, Parallelogram. Elearning.

Problem 242. Triangle with Equilateral triangles, Parallelogram

In the figure, equilateral triangles ABC', BCA', and ACB' are constructed on the sides of a triangle ABC. Prove that A'BC'B' is a parallelogram. Post a comment.

Elearn 242: Triangle with equilateral triangles

See also:

Equilateral Triangle
Parallelogram

Elearn 242: Equilateral triangle and parallelogram