Thought I had it but can’t get improper fraction any help is greatly appreciated

In which source of water would a wave travel the fastest? o ice o cold o room temperature o hot mark this and return save and exit next

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

What’s the answer ? use the picture to see the problem