Sphere

A sphere is a geometrical object that is a three-dimensional analogue to a two-dimensional circle. Formally, a sphere is the set of points that are all at the same... Wikipedia

• Type:  Smooth surface Algebraic surface
• χ:  2
• Symmetry group:  O(3)
• Surface Area:  4πr 2
• Volume:  πr 3
• Data source:  DuckDuckGo