What is the area of DEF

yo you know you can use the scan &solve

240 cm^2

find the scale factor of the length

k=20/6=3.33...

multiply the area of triangle ABC by the scale factor so 72 x 3.333..=240

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.