Question

In ∆ABC and ∆DEF, we have: AB/DE = BC/EF = AC/DF = 5/7 , then ar(∆ABC) : ∆(DEF) = ? (a) 5 : 7 (b) 25 : 49 (c) 49 : 25 (d) 125 : 343

Answer 1

Answer:

Might it help u..

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B option is correct

Because these triangles are similar and in similar triangles by area ratio theorem ratio of area of similar triangles is equals to the ratio of corresponding sides

Or here ratio of sides is 5/7 ,so ratio of area of triangles is (5/7)^2

that is 25/49

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