10^2 . (3/5)2 - 7= ?

10^2 x (3/5)^2 - 7

= 100 x 9/25 - 7

= 900/25 - 7

= 36 - 7

= 29

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.