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The Five Touching Spheres 2 (Posted on 2019-09-15) Difficulty: 3 of 5
Two balls of radius 2 and two balls of radius 6 are all externally tangent to each other. A fifth, smaller ball is tangent to all four balls. What is its radius?

See The Solution Submitted by Brian Smith    
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  Subject Author Date
re: The Five Touching Spheres 2kexegiho2019-09-30 13:19:23
No Subjectkexegiho2019-09-30 13:17:57
exact solutionSteven Lord2019-09-18 02:50:14
iterative solnSteven Lord2019-09-16 02:06:06
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