OK, This one really needs a diagram to explain so check the attached image I created.
(I need to find the lengths of the blue triangle).
A car is sitting at a known point within the perimeter of a circle of a known radius.
It travels in a straight line in a known direction for a known distance which happens to take it outside the circle.
How do I calculate the coordinate for the point at which the car intersects the circle?
Two more minor details...
1) The car does not necessarily begin at the center of the circle.
2) The direction the car takes does not necessarily radiate from the center either.
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