von Gagern » Martin » StackExchange » | Tangent circle |

This is an interactive illustration for
my answer
to the Math StackExchange
question Given
a triangle *ABC* and
a circle *K*_{1} tangent
to *AB* and *AC*, construct
a circle *K*_{2} tangent
to *K*_{1}, *BA*, and *BC*.

The illustration was created using Cinderella and is presented here using CindyJS.