Draw pie slice with Google maps

Question

I have three points on my map and I want to draw a "slice of pie" on it based on these points, I literally have no idea where to start with this so here is the information I have.

latitude and longitude of the centre of the circle
latitude and longitude of the top left & top right of the slice

I also have a circle already drawn on the map using these details, so here is what I currently have

And here is what I wish to achieve

Answer 1

Maybe this example can help ?

http://www.geocodezip.com/v3_polygon_example_arc.html