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Quadrilateral ABCD  is a parallelogram. Let E  be a point on AB, and let F be the intersection of lines DE and BC. The area of triangle EBF is 1 and the area of triangle EAD  is 20. Find the area of parallelogram ABCD.

 Oct 18, 2021
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Quadrilateral ABCD  is a parallelogram. Let E  be a point on AB, and let F be the intersection of lines DE and BC. The area of triangle EBF is 1 and the area of triangle EAD  is 20. Find the area of parallelogram ABCD.

 

Let quadrilateral ABCD be a rectangle.

 

AE = 10

AD = 4

BE = √5

BF = √0.8

[ABCD] = 4(10 + √5)

 Oct 19, 2021

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