Lines and Triangles

Identify the angles given in the figure. 
Assume that $$\displaystyle AB\parallel CD$$ and EF is transversal.
In any right triangle, the hypotenuse is .......... than any one of the other sides, but less than their sum.
In fig find the values of $$x$$ and $$y$$ and then show that $$AB \parallel CD$$
_____ condition is not considered for the similarity of triangle.
Find the complement of $$0^o$$: