幾何(きか)

幾何(きか) is the Japanese term for geometry, the branch of mathematics dealing with shapes, sizes, and spatial relationships.

Etymology

• 幾(いく): how many, some
• 何(なに): what

The term comes from classical Chinese and originally meant 'how much/many'.

Common collocations

• 幾何(きか)学(がく): geometry (as a field of study)
• 幾何(きか)学(がく)的(てき): geometric, geometrical
• 平面(へいめん)幾何(きか): plane geometry
• 立体(りったい)幾何(きか): solid geometry
• 解析(かいせき)幾何(きか): analytic geometry
• ユークリッド幾何(きか)学(がく): Euclidean geometry

Related math terms

• 代数(だいすう): algebra
• 解析(かいせき): analysis (calculus)
• 図形(ずけい): shape, figure
• 三角形(さんかくけい): triangle
• 円(えん): circle

Usage

In everyday contexts, 幾何(きか)学(がく)的(てき) (geometric) is more commonly used than 幾何(きか) alone, as in 幾何(きか)学(がく)的(てき)な模様(もよう) (geometric pattern).