If cot x = -4/3 find csc x, if 270°<x<360"

Which math sentence can be used to determine if the triangle is a right triangle?

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

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