See complete Problem 165 at:

www.gogeometry.com/problem/p165_parallelogram_triangle_area.htm

Parallelogram, Diagonal, Triangles, Areas. Level: High School, SAT Prep, College geometry

Post your solutions or ideas in the comments.

## Tuesday, August 26, 2008

### Elearn Geometry Problem 165

Labels:
area,
diagonal,
parallelogram,
Problem 163,
triangle

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As proved in Problem 163, Tr. ABF = V(S1*S2)

ReplyDeleteSince ABCD is a parallelogram S = 2*Tr ABD =

2(S2 +Tr. ABF)= 2(S2 +V(S1*S2)) = 2S2 + 2V(S1*S2)

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