two circles part1�@�@

�@There are two circles.The black circle is inside of the blue circle.The black circle is rolling on the blue circle.Point Q is on the black circle. Move point P to find the geometric quality of point Q. E-mail me �@You can also change the numbers (TO,TO',QO',TO',n) on CABRI. Download CABRI�U data (d56) from here.