which of the following are congruence theorems for right triangles

How do i do this activity, is appreciated

If value of cos330° is √3/2 then find tan165°.

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick