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Question


The given figure shows a pentagon ABCDE, EG, drawn parallel to DA, meets BA produced at G and CF drawn parallel to DB, meets AB produced at F. The area of Δ GDF is equal to area of ______ .


A
Δ ABD
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B
Quadrilateral GBDE
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C
Pentagon ABCDE
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D
Quadrilateral AFCD
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Solution

The correct option is C Pentagon ABCDE

(i) EG || DA ..... (given)

(ii) area Δ AED = area Δ AGD ..... (triangles on the same base and between the same parallels)

(iii) CF || DB ..... (given)

(iv) area Δ BDC = area Δ BFD …. (triangles on the same base and between the same parallels)

(v) Adding equations (ii) and (iv) and adding area Δ ABD to both sides we get

area Δ AED + area Δ ABC + area Δ BDC = area Δ AGD + area Δ ABC + area Δ BFD

Area of pentagon ABCDE = area of Δ GDF (From the figure)


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