Plz Helo
Answer correct please but It can tell if the answer is wrong ​

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

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

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*