I'm so confused, could somebody explain how to solve this?

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?