Geometry Problem 166. Parallelogram, Diagonal, Triangles, Areas.
Level: High School, Honors Geometry, College,
Mathematics Education

In the figure below, ABCD is a
parallelogram with E an interior point. F is the point of
intersection of diagonal BD and line AE. If S, S1,
and S2
are the areas of triangles ABF, BEC, and DEF respectively,
prove that S = S1
+ S2.
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161170 
Area of a Parallelogram  Email
 By Antonio Gutierrez
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