I need help please ?

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

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is