noun
solid geometry
Mathematical term for the study of three-dimensional figures and their properties.
立体幾何学では、球や立方体の体積を計算する。
In solid geometry, we calculate the volume of spheres and cubes.
平面幾何学 is plane geometry (two-dimensional), while 立体幾何学 is solid geometry (three-dimensional).
Compound of 立体 (solid, three-dimensional) and 幾何学 (geometry). The term is a direct calque from Western mathematical terminology.