Hi people,

Basically I have 2 points, I know both of the point's X and Y co-ordinates.

I am wanting to find the angle between the 2 points based off of North. (0 degrees)

Pic: http://i44.tinypic.com/292o27d.jpg

In the picture, the angle i'm after would be roughly midway between 270 and 360 (315)

Sorry if i've posted this in the wrong section, i've really got no idea if this is trigonometry, geometry or what lol.

Thanks,

James