Answer the question in the screen shot right

Step-by-step explanation:

The figure has 8 sides that are each line segments joined at the ends. An 8-sided polygon is called an octagon. Though the sides are the same length, not all angles are congruent, so the polygon is not a regular polygon. Some of the angles are reflex angles, so the polygon is concave, not convex.

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.