Four equilateral triangles. Prove that the red quadrilateral is a parallelogram.

Scroll down for a solution to this problem.

geometry puzzles

Categories

- Post author By Rik D. Tangerman
- Post date March 23, 2023
- No Comments on Three’s a crowd

Four equilateral triangles. Prove that the red quadrilateral is a parallelogram.

Scroll down for a solution to this problem.

- Tags parallelogram, triangle