Online Geometry theorems, problems, solutions, and related topics.
Geometry Problem. Post your solution in the comments box below.Level: Mathematics Education, High School, Honors Geometry, College.Click the diagram below to enlarge it.
Let H be the orthocenter of ΔACE, then ABCH, CDEH and EFAH are parallelograms. The result S=2S₁ is then obvious.
Draw the orthocentre and yo'll get the answer