Help me its due today and don't delete my question a lot of people deleted my questions xd.

How do you write a paragraph proof to prove that the corresponding angles shown are congruent

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

The circle below is centered at the point (3, 1) and has a radius of length 2. what is the equation?