tossed two coins simultaneously so times and list all outcomes. write the events that tossing both coins head, tossing both coins tail, tossing at least one head, tossing the head, is there any relation between tossing at least one head and tossing both head?by ​

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