Problem of Apollonius, CLL Problem

One circle c and two lines l1 and l2 are given. All circles which are tangent to the given circle and to the given lines shall be constructed.

You can drag the center of the circle c or the lines l1 and l2, and vary the radius (with pressed mouse button). For each type of solution, you can decide, whether the solution circles are to be drawn. The total number of solutions is indicated on the bottom right.

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