The figure shows a parallelogram ABCD with equilateral triangles ABE, BCF,CDG, and ADH. Prove that EFGH is a parallelogram.

1 Parallelogram + 4 Equilateral Triangles = 😮? How to prove? Source: @gogeometry. https://t.co/WMeTPYGR3T. @geogebra #MTBoS #ITeachMath #geometry #math #maths #EdTech #MathEd #proof #algebra #HSMath #CollegeMath pic.twitter.com/jkY2tl8ncD— Tim Brzezinski (@Brzezinski_Math) January 10, 2020

1 Parallelogram + 4 Equilateral Triangles = 😮? How to prove? Source: @gogeometry. https://t.co/WMeTPYGR3T. @geogebra #MTBoS #ITeachMath #geometry #math #maths #EdTech #MathEd #proof #algebra #HSMath #CollegeMath pic.twitter.com/jkY2tl8ncD

Home | Search | Geometry | Problems | All Problems | Open Problems | Visual Index | 761-770 | Triangles | Equilateral Triangle | Parallelogram | Email | Solution / comment | By Antonio Gutierrez