Verify through an informal, paragraph proof that in a kite one diagonal bisects a pair of opposite angles refer to this image

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

Find the slope of the line passing through a pair of points

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?