KnowraSpherical geometryLinked fromLinked fromThe 30 pages that link to Spherical geometry, each with the reason it gives.All 30Broader topic 5Related 8Narrower topic 8Compared with 9Euclidean geometryBroader topic: Great-circle triangles demonstrate how curvature changes Euclidean angle and distance rules.Pythagorean theoremBroader topic: Spherical right triangles obey a trigonometric relation rather than the Euclidean sum of squared sides.Non-Euclidean geometryBroader topic: It provides a concrete setting where triangle angles exceed 180 degrees.Parallel postulateBroader topic: It provides a concrete model in which the Euclidean parallel postulate fails.Geometric proofBroader topic: Its triangles demonstrate that familiar Euclidean angle and parallel results are not universal.