Polyhedron Circumscribed About a Sphere
Polyhedron in which all the faces are tangent to a sphere.
- A polyhedron that can be circumscribed about a sphere is called a circumscribable polyhedron.
- All regular convex polyhedra can be circumscribed about a sphere.
Example
This is a cube circumscribed about a sphere:
The sphere is tangent to the cube at six points of tangency.