Ihave no congruent sides. one of my angles has a measure of 100 degrees.

What is the difference between regular convex and concave polygons

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

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with