- 曾几何时 céngjǐhéshí not long agoit was only a short time ago; just a while before
- 几何学 jǐhéxué geometry
- 几何级数 jǐhéjíshù geometric series
- 解析几何 jiěxījǐhé analytic geometrythe branch of mathematics that uses coordinates and algebraic methods to represent and solve geometric problems
- 平面几何 píngmiànjǐhé plane geometry
- 球面几何 qiúmiànjǐhé spherical geometry
- 几何平均数 jǐhépíngjūnshù geometric mean
- 几何拓扑 jǐhétuòpū geometric topology(math.) geometric topology
- 几何拓扑学 jǐhétuòpūxué geometric topologythe study of manifolds and their properties in the field of mathematics
- 几何级数增长 jǐhéjíshùzēngzhǎng exponential growthexponential increase
- 几何量 jǐhéliàng geometric quantitya quantity related to geometry, such as length, area, or volume
- 分形几何 fēnxíngjǐhé fractal geometry
- 分形几何学 fēnxíngjǐhéxué fractal geometry
- 双曲几何 shuāngqūjǐhé hyperbolic geometry
- 射影几何 shèyǐngjǐhé projective geometry
- 射影几何学 shèyǐngjǐhéxué projective geometry
- 微分几何 wēifēnjǐhé differential geometry
- 微分几何学 wēifēnjǐhéxué differential geometry
- 投影几何 tóuyǐngjǐhé projective geometry
- 投影几何学 tóuyǐngjǐhéxué projective geometry
- 欧式几何 ōushìjǐhé Euclidean geometry
- 欧式几何学 ōushìjǐhéxué Euclidean geometry
- 欧氏几何学 ōushìjǐhéxué Euclidean geometry
- 画法几何 huàfǎjǐhé descriptive geometrydescriptive geometry (three-dimensional geometry using projections and elevations)
- 立体几何 lìtǐjǐhé solid geometry
- 罗式几何 Luóshìjǐhé hyperbolic geometryA non-Euclidean geometry, also known as Lobachevskian geometry, characterized by a constant negative curvature.
- 罗氏几何 Luóshìjǐhé hyperbolic geometrya non-Euclidean geometry also known as Lobachevskian geometry, characterized by the assumption that multiple parallel lines can pass through a point relative to a given line
- 解析几何学 jiěxījǐhéxué analytic geometrythe branch of mathematics that uses algebraic equations and coordinate systems to solve geometric problems
- 非欧几何 fēi'ōujǐhé non-Euclidean geometry
- 非欧几何学 fēi'ōujǐhéxué non-Euclidean geometry
- 黎曼几何 Límànjǐhé Riemannian geometry(math.) Riemannian geometry
- 代数几何 dàishùjǐhé algebraic geometry
- 黎曼几何学 Límànjǐhéxué Riemannian geometry
- 代数几何学 dàishùjǐhéxué algebraic geometry
- 内在几何 nèizàijǐhé intrinsic geometry
- 内在几何学 nèizàijǐhéxué intrinsic geometry
- 几何光学 jǐhéguāngxué geometric optics
- 几何原本 Jǐhé Yuánběn ElementsEuclid's "Elements"
- 几何图形 jǐhétúxíng geometric figure
