EntityQ12137· pop 11· linked from 13 articlesspherical shellSign in to saveRegion between two concentric spheres of differing radiiWikidata factsInstance ofshapePart ofgeometryShow 1 more factP6104WikiProject Mathematicsvia Wikidata · CC0ConnectionsgeometryEntityInternational Standard Book NumberEntityCategoriesElementary geometryEuclidean solid geometryGeometric shapesSpherical geometry