Order from lease to greatest: 5/6, 4/5, 0.82?

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

Which polygon is she in the process of constructing ?

Can someone me and explain..will award brainlest!