The Napkin Ring Problem
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Math topics:
Elementary geometryParallel (geometry)CircumferenceSphereAlgebraSquare (algebra)Division (mathematics)Square rootTriangle geometryRight triangleAltitude (triangle)HypotenuseLengthPythagorean theoremAreaRadiusVolumeCavalieri's principleVolumeNapkin ring problemElementary arithmeticMultiplicationNegative numberSign (mathematics)RatiosCirclePiCoefficient of determinationSubtractionSubtractionPlus and minus signsDistance