perplexus.info :: Geometry : Circles surrounding circles I

Circles surrounding circles I (Posted on 2024-08-30)

Two unit circles are completely enclosed by a ring of four identical circles. Find the minimum radius of the surrounding circles.

Note: A ring of circles is a set where each is externally tangent to exactly two others and they enclose a single region.

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	Subject	Author	Date
	soln	Steven Lord	2024-08-30 10:03:58

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