Find all solutions of the equation in the interval [0, 2pi). 2 sin 0-sqrt2 = 0
Write your answer in radians in terms of n.
If there is more than one solution, separate them with commas.

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.