Online Geometry Problems

Online Geometry Problem 785: Equilateral Triangle, Parallel to a side, Perpendicular to a side, Metric relations. Level: High School, SAT Prep, College, Mathematics Education

The figure below shows an equilateral triangle ABC with DE parallel to BC and EF parallel to AB. D and G are on AB; F and H are on BC. GM and HN are perpendicular to AC. If AC = a, DG = d, FH = f, and MN = x prove that Formula to prove.
 

Equilateral Triangle, Parallel to a side, Perpendicular to a side
 


 

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