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Question

In the given figure, ABCD is a parallelogram. E and F are midpoints of BC and AD respectively. The ratio of area Δ AFE : area of parallelogram ABCD is


A

8 : 1

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B

4 : 1

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C

1 : 4

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D

1 : 8

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Solution

The correct option is C

1 : 4


(i) ABCD is a parallelogram ..... (given)

(ii) E is mid point of BC and F is midpoint of AD ..... (given)

(iii) Therefore, BE = EC = AF = FD

(iv) BEFA and ECDA are parallelograms ..... (one pair of opposite sides are equal and parallel)

(v) Therefore, area of parallelogram ACEF = area of of parallelogram ECDF = 12 Parallelogram ABCD.... (parallelograms having equal bases and between the same parallels are equal in area)

(vi) Area AFE= 12 area of parallelogram ABEF……. (area of triangle is half the area of parallelogram if they have the same base and between the same parallels)
=12×[12area of parallelogram ABCD]
=14 area of parallelogram ABCD


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