The question is as follows:
Let WISH be a cyclic quadrilateral, and K be the intersection of its diagonals WS and HI. Given that arc WI is 100 degrees and arc SH is 80 degrees, find the sizes of as many angles in the figure as you can.
I am really stuck in this problem. I am not sure whether K is the radius of the circle because it is the intersection of the diagonals. I just need a start, but I don't where to start. Any help will be really appreciated.