hard geometry question
Four distinct points are chosen at random on a circle. LIne segments are then drawn connecting every possible pair of these points. Theses line segments divide the interior of the circle into how many individual nonoverlapping regions of nonzero area?
I keep on getting the answer c because I made a square connecting the points. However that answer is obiously wrong and I don't know how. I am seriously stuck and I need some major help on this. THANK YOU!!!!!!