Verified Answer :

TheHero

The two triangles,  ABC, A'B'C are similar

so

CB/CB' = CA/CA' = BA/B'A'

BA/B'A' = 4/20

BA = 1/5 B'A'

BA = D.F B'A'  (DF is dilation factor)

DF = 1/5


calculista

we know that

If

the two triangles, ABC and A'B'C are similar


then


\(CB/CB' = CA/CA' = BA/B'A'\)


\(CA/CA'= \frac{4}{20}\)


\(CA/CA'= \frac{1}{5}\)


\(BA/B'A'= \frac{1}{5}\)


\(B'A' = 5BA\)


therefore


the answer is the /option D)

\(5\)

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