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.
+1694 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)
