Question

If Triangles ABC and DEF are similar, Area of triangle ABC is 64 cm² while area of DEF is 121 cm². If EF side is 15.4 cm long. Find BC​

Answer 1

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Answer

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Refer to attachment

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Answer 2

≛ Given that :

Area of ΔABC = 64 cm^2

Area of ΔDEF = 121 cm^2

and EF = 15.4 cm

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As we know that,

area(ΔABC)/area(ΔDEF) = (BC/EF)^2

on putting the values...

➡️ 64/121 = (BC/15.4)^2

➡️ BC = (64 × 15.4 × 15.4/121)

on solving...

➡️ BC = 11.2 cm ans.

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