Dynamic Geometry

Given three disjoint circles A, B and C of unequal radii situated entirely in each other's exterior. Then the common external tangents taken in pairs, meet in three points X, Y and Z which lie on a line.

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## Wednesday, December 3, 2008

### Monge & d'Alembert Three Circles Theorem I

Labels:
circle,
collinear,
dynamic geometry,
Monge d'Alembert theorem

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