Thank u :)!! for the help

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

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i