Proceedings of the Edinburgh Mathematical Society

Research Article

Determination of the radii of the circles which touch three given circles

Alex Holm

Let the points A, B, C be the centres of three given circles, whose radii are a, b, c; and let d, e, f be the distances BC, CA, AB between the centres (Fig. 41). It is required to find the radii of the circles which touch the circles A, B, C.