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Question

What is the ratio of the area of parallelogram ABCD to the sum of areas of ΔABE and ΔABF?


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Solution

We can clearly see that

EG = DH = FI --------- (1)

So, the height of the parallelogram ABCD is exactly equal to the heights of Δ ABE and ΔABF.

Also, the base of all the figures are same i.e. AB.

Area of parallelogram ABCD=AB×DH

Area of ΔABE=12×AB×EG

Area of ΔABF=12×AB×FI

Area of ΔABE+ Area of ΔABF=[12×AB×EG)]+[12×AB×FI]

=AB×DH [Using equation 1]

Area of ΔABE + Area of ΔABF = Area of parallelogram ABCD

Hence, ratio = 1:1


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