Question

let abc and def be similar triangles and their area be 64 cm square and 121 cmsquare respectively. if Ef=15.4 cm then bc=

Answer 1

b) 11.2 is the correct
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Answer 2

the answer is option B

ar(ABC)/ar(DEF) = BC square / EF square

64/121= 15.4^2/EF^2

square rooting both sides, we get

8/11=15.4/EF

EF=11.2

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