Construct with on and on, such that is perpendicular to and tangent to . Construct with on and on such that is perpendicular to and tangent to . Let be the inscribed circle of and the inscribed circle of .
Ay makagawa ng may on at on, Tulad na ay tirik na at padaplis na . Ay makagawa ng may on at on tulad na ay tirik na at padaplis na . Hayaan ang inscribed ng bilog at ang inscribed ng bilog .