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Areas of similar triangles - class-X

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If $\triangle ABC\sim \triangle DEF$ and $AB:DE=3:4$, then the ratio of area of triangles taken in order is 

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A
$\dfrac{9}{16}$
💡 Explanation:
 In similar triangle,
         Rratio of areas of triangle = square of ratio of corresponding sides
       Ratio of areas of triangle=${\dfrac {3^2}{4^2}}$
                                                 =$\dfrac{9}{16}$
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