noun
spherical geometry
A branch of geometry dealing with figures on the surface of a sphere. Used in mathematics and related fields.
球面幾何学では、三角形の内角の和は180度より大きくなる。
In spherical geometry, the sum of the interior angles of a triangle is greater than 180 degrees.
Plane geometry, dealing with flat surfaces, as opposed to spherical geometry.
Non-Euclidean geometry, a broader category that includes spherical geometry.
Compound of 球面 (spherical surface) and 幾何学 (geometry). The term is a direct calque from English 'spherical geometry'.