Each of the two circles is uniquely determined by its three tangencies; constructing each of the twin circles from its tangencies is a special case of the Problem of Apollonius.
Constructing it is a special case of the Problem of Apollonius. Each of the two circles is uniquely determined by its three tangencies.
Each of the two circles is uniquely determined by its three tangencies. Constructing it is a special case of the Problem of Apollonius.
Each of the two circles is uniquely determined by its three tangencies. Constructing it is a special case of the Problem of Apollonius.