Five circles theorem

In geometry, the five circles theorem states that, given five circles centered on a common sixth circle and intersecting each other chainwise on the same circle, the lines joining their second intersection points forms a pentagram whose points lie on the circles themselves.

See also

• Clifford's circle theorems
• Miquel's theorem
• Six circles theorem
• Seven circles theorem

References

• Wells D (1991). The Penguin Dictionary of Curious and Interesting Geometry. New York: Penguin Books. p. 79. ISBN 0-14-011813-6.

External links

• Weisstein, Eric W., "Miquel Five Circles Theorem", MathWorld.
• Weisstein, Eric W., "Miquel Pentagram Theorem", MathWorld.