Solids {zone, sphere} {band}| can result when circle sector rotates around sphere diameter that does not pass through sector. Zone is on sphere surface. Right-circular cone connects sphere center to closer zone base.
Solids {cap, circle}| {cap zone} can result when circle sector rotates around sphere diameter that passes through sector. Right-circular cone connects sphere center to cap base.
Circles can make ellipsoids {spheroid} of revolution.
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Date Modified: 2022.0225