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 Problem 121. Triangle, Similarity and Area. Level: High School, SAT Prep, College

In the figure below, given a triangle ABC of area S, the medians BM and CN meet at G. Let be BD = 2 CD, the cevian AD meets BM and CN at E and F respectively. Area of triangle EFG is S1. Prove that: GE/EM = 2/3, GF/CF = 1/3 and S1 = S/60.
Post a comment or solution.

Elearning 121:Similarity and Area

 

FACTS AND HINTS:

Geometry problem solving is one of the most challenging skills for students to learn. When a problem requires auxiliary construction, the difficulty of the problem increases drastically, perhaps because deciding which construction to make is an ill-structured problem. By “construction,” we mean adding geometric figures (points, lines, planes) to a problem figure that wasn’t mentioned as "given."


 

 

Elearning 121: Triangle similarity, area

 

 

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