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Question

If the areas of two similar triangles are equal,then prove that they are congruent.

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Solution

LetABC DEFand AreaABC = AreaDEF)

Since the ratio of the area of two similair triangles is equal to the ratio of the squares on thier corresponding sides, we have.

Area of (ABC)Area of (DEF) = AC2DF2 =BC2EF2

AB2DE2 =AC2DF2 =BC2EF2 =1 [ Area(ABC = Area(DEF)]

AB2 =DE2,AC2=DF2and BC2 =EF2

AB = DE,AC = DFand BC = EF

ABC DEF [By SSS congruence]


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