Using a ruler and a compass how can construct a line through a point and tangent to a circle. What I don't want is to eyeball the line by trying to line-up the ruler over the circle. Best if I could construct the point of intersection first and then draw the line.
PS. I know how to do it mathematically, I just don't know the steps for geometry, given A, C and the circle to find D.
Update Based on answers here is the constructors. Thanks for the quick responses.