Difference between revisions of "Cube (geometry)"
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==Formulas== | ==Formulas== | ||
| − | For a cube with [[edge]]-[[length]] <math>s</math> | + | For a cube with [[edge]]-[[length]] <math>s</math> has: |
| − | * | + | * Four [[space diagonal]]s of length <math>s\sqrt{3}</math> |
| − | * | + | * [[Surface area]] <math>6s^2</math> |
| − | * [[Volume]] | + | * [[Volume]] <math>s^3</math> |
| − | * [[ | + | * A [[circumscribe]]d [[sphere]] of [[radius]] <math>\frac{s\sqrt{3}}{2}</math> |
| − | * [[ | + | * An [[inscribe]]d sphere of radius <math>\frac{s}{2}</math> |
| − | * | + | * A sphere tangent to all of its edges of radius <math>\frac{s\sqrt{2}}{2}</math> |
==See also== | ==See also== | ||
Revision as of 20:01, 7 September 2007
A cube, or regular hexahedron, is a solid composed of six square faces. A cube is dual to the regular octahedron and has octahedral symmetry. A cube is a Platonic solid.
Formulas
For a cube with edge-length 
has:
- Four space diagonals of length
- Surface area
- Volume
- A circumscribed sphere of radius
- An inscribed sphere of radius
- A sphere tangent to all of its edges of radius
See also
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