How do you find a slant/oblique asymptote?

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

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Find the distance between (0,5) & (-4,2)