I need help on this? Can anyone help me on it?

Step-by-step explanation:

ooooh I loved these.  ok. so if you have a set of lines like this, we will just use an "x" as an example for lines crossing. if you have 100 as the angle on the top, then the angle on the bottom will be exactly the same. the top and bottom are the same angle ALWAYS. the angles across from each other are the same. because will timeout on me if I stop typing, I will post this and later I will post a picture of the first few finished as an example so you get what i'm talking.

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.

mean, 40.6

step-by-step explanation: