Linked from

The 40 pages that link to Sphere, each with the reason it gives.

• Euler characteristicRelated: Its Euler characteristic is two, matching the boundary of any convex polyhedron.

• ArchimedesRelated: Archimedes proved the sphere's surface area and volume in relation to its enclosing cylinder.

• Simply connected spaceRelated: Spheres of dimension at least two are simply connected, unlike the circle.

• Direct imaging of exoplanetsRelated: Its coronagraphs and adaptive optics support direct searches for exoplanets and disks.

• Magnus effectRelated: A spinning sphere provides a standard geometry for measuring lateral force.

• Banach–Tarski paradoxRelated: The construction first exploits rotational symmetries on the sphere.

• SteradianRelated: The unit’s definition measures a patch on a sphere centered at the angle’s vertex.

• Pappus's centroid theoremRelated: A semicircle’s area and centroid path recover the sphere’s volume.

• Square degreeRelated: Solid-angle area is measured on a sphere centered at the observation point.

• Pappus's area theoremRelated: A semicircle rotated about its diameter generates a sphere whose area the theorem recovers.