The sketch rectangle create a rectangle aligned to the axis, and you want ine free to rotate on the plane of the drawing. You can do this by sketching 4 segments as a loop, at any angle to the axis to avoid the automatic constraints of horizontal and vertical..Constrain the lines to from a rectangle, i.e. two opposite sides as parallel and same length., and the angle of one corner to 90%.yo8u can then constraing two corner to be on each other, and set the angle between the rectangles.