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The 22 pages that link to Great circle, each with the reason it gives.

• GeodesicBroader topic: Its arcs are the sphere's geodesics and give its locally shortest surface paths.

• SphereBroader topic: It is the largest circle that can lie on a spherical surface.

• Spherical geometryRelated: Great circles provide the straightest paths and the sides of spherical triangles.

• EquatorRelated: The Equator is Earth’s only parallel of latitude that is a great circle.

• Line (geometry)Broader topic: It is a spherical analogue of a straight line, not a Euclidean line.

• Spherical trigonometryBroader topic: Great-circle arcs form the sides whose lengths spherical-triangle formulas relate.

• CircumnavigationRelated: Great-circle paths explain why efficient global routes appear curved on flat maps.

• Elliptic geometryBroader topic: Great circles represent lines in the spherical model of elliptic geometry.

• MeridianRelated: Each meridian forms half of a great circle completed by its opposite meridian.

• Prime meridianRelated: Meridians are halves of great circles, but the zero assignment is conventional.

• HemisphereBroader topic: A great circle can form the boundary between two hemispheres.

• Rhumb lineCompared with: A great-circle arc usually saves distance but does not maintain a constant compass bearing.

• Stereographic projectionRelated: Great circles through the projection point map to straight lines in the plane.

• Great-circle distanceBroader topic: Every shortest surface path between non-antipodal points follows an arc of a great circle.

• Spherical law of cosinesRelated: Spherical triangle sides are arcs of great circles, measured by their central angles.

• Spherical triangleBroader topic: Each side of a spherical triangle lies along a great circle.

• Spherical excessBroader topic: The sides of a spherical triangle lie along great-circle arcs.

• Unit sphereBroader topic: Great circles are the unit sphere's geodesics and have circumference 2π.

• 180th meridianRelated: Like every meridian, the 180th meridian forms half of a great circle with its opposite meridian.

• Land and water hemispheresRelated: A plane through Earth's center divides the globe into two hemispheres along a great circle.

• Circle of latitudeCompared with: Only the equator is a great circle among circles of latitude.

• Ley lineRelated: Long alignments across Earth require distinguishing flat-map lines from spherical routes.