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cylinder
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3D shapes A red sphere fits perfectly inside a transparent blue cylinder, illustrating Archimedes' relationship between the surface area and volume of a sphere and its circumscribing cylinder, with labeled formulas and dimensions. The normal, or perpendicular, at each point of a surface defines the corresponding tangent plane, and vice versa.
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3D shapes
A group of three-dimensional geometric solids—pyramid, cube, sphere, cone, and cylinder.
Encyclopædia Britannica, Inc.
sphere with circumscribing cylinder
The volume of a sphere is 4πr3/3, and the volume of the circumscribing...
Encyclopædia Britannica, Inc.
The normal, or perpendicular, at each point of a surface defines the corresponding...
Encyclopædia Britannica, Inc.
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