I have two circles that are tangent to one another and touches one another at exactly one point. The two circles share a common tangent line at the tangent point.
A (x1, y1), A (r1), B (x2, y2), B (r2), and l are known.
Is there an easy geometric way to get (x, y) positions of C
and D
points by changing the given input (length) l
?