三角錐(さんかくすい)

さんかくすい
noun
triangular pyramid; tetrahedron
1. triangular pyramid; tetrahedron
A solid figure with a triangular base and triangular side faces meeting at a single apex.
この置物(おきもの)は三角錐(さんかくすい)の形(かたち)だ。
This ornament is shaped like a triangular pyramid.
三角錐(さんかくすい)の体積(たいせき)を求(もと)めなさい。
Find the volume of the triangular pyramid.
折(お)り紙(がみ)できれいな三角錐(さんかくすい)を作(つく)るのは意外(いがい)と難(むずか)しい。
Making a neat triangular pyramid out of origami is surprisingly difficult.

Composed of 三角(さんかく) (triangle) + 錐(すい) (a pyramid or cone solid). A basic shape in school geometry.

SIMILAR WORDS:

  • 円錐(えんすい): cone — has a circular base
  • 四角錐(しかくすい): square pyramid — has a square base
  • 角錐(かくすい): pyramid — the general term for a solid with a polygonal base
general
Added 2026.6.19 0:20
29000/29329_sankakusui