Question

If AABC - ADEF and their areas be 121 cm2 and
169 cmº respectively. If EF = 1.3 cm, then the
side BC is______​

Answer 1

Answer:

BC=1.1 cm

Step-by-step explanation:

∆ABC ~ ∆DEF

therefore,

$\frac{area \: of \: △abc}{area \: of \: △def} = { ( \frac{BC}{EF})}^{2}$

=>

$\frac{121}{169} = {(\frac{BC}{1.3}) }^{2}$

=>

${( \frac{11}{13} )}^{2} = { (\frac{BC}{1.3} ) }^{2}$

=>

$\frac{11}{13} = \frac{BC}{1.3}$

=>

$\frac{11 \times 1.3}{13} = BC$

=>

$BC = 1.1cm$

Answer 2

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