Re: info-performer Jan 01 2000

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Francois Sillion (Francois.Sillion++at++imag.fr)
Sun, 2 Jan 2000 20:42:29 +0100

The tangent to a circle at any point is perpendicular to the line
from that point to the center of the circle. Therefore the line
perpendicular to the tangent common to the two circles at the contact
point runs through both centers.

Happy new year!

> From: Jane Moore <jane.moore++at++sympatico.ca>
> Date: Sat, 01 Jan 1994 16:25:59 -0500
> Subject: circle problems
>
>I would be very happy if you could help me solve this problem:
>
>Prove that the point of contact of two tangent circles is on the line
>joining the centres of the two circles.
>
>Thanks,
>Jane
>
>
>******************************************************************************

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+------------------+--------------------------------------------------------+
| Francois SILLION | iMAGIS, Laboratoire GRAVIR/IMAG (CNRS,INRIA,INPG,UJF) |
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