e/Six circles theorem

Information
has gloss	eng: In geometry, the six circles theorem relates to a chain of six circles drawn tangent to a given triangle, such that each circle is tangent to two sides of the triangle and also to the preceding circle in the chain. The chain closes, in the sense that the sixth circle is always tangent to the first circle.
lexicalization	eng: six circles theorem
instance of	(noun) any circular or rotating mechanism; "the machine punched out metal circles" circle, round