Linked from

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

• Great circleNarrower topic: A great circle is defined by slicing this surface with a central plane.

• RadiusNarrower topic: A sphere has radii from its center to its surface, extending the circle idea into space.

• HemisphereNarrower topic: A hemisphere is formed by dividing a sphere through its center.

• Rhumb lineNarrower topic: The classical rhumb line is defined on a spherical model of Earth.

• Stereographic projectionNarrower topic: The projection begins with a sphere and sends its surface points to a plane.

• Unit sphereNarrower topic: The unit sphere is the special case with center at the origin and radius one.

• Borsuk–Ulam theoremNarrower topic: The theorem applies to spheres in every positive dimension.

• Hairy ball theoremNarrower topic: The theorem concerns tangent fields on spheres of even dimension.

• 3-sphereNarrower topic: The 3-sphere extends the familiar sphere by one ambient dimension.

• Azimuthal equidistant projectionNarrower topic: The classic form of the projection maps distances measured over a spherical Earth.

• Monge's theoremNarrower topic: The theorem extends from circles to spheres without changing its collinearity conclusion.

• Hubble volumeNarrower topic: The Hubble volume applies the sphere’s volume formula to the Hubble radius.