Question

Hello!

Can I get some help with that question please. I don't think I did it right, sadly.


Thank you!

Don't forget to show your work and give as much details possible.

Answer 1

Let O be the point of intersection of diagonals.

Consider triangles FOE and EOD:
FO = OD, ∠FOE = ∠EOD and OE is a common side ⇒
triangles FOE and EOD are congruent.

In congruent triangles all corresponding sides and are congruent ⇒
EF = DE = 6