noun
- plural of decahedron; three-dimensional geometric shapes with ten faces
Usage: geometry; mathematics
Examples
- The students studied various decahedra in their geometry class.
- These decahedra have different arrangements of triangular and quadrilateral faces.
- The mathematician displayed models of several decahedra on her desk.
- Regular decahedra are less common than other polyhedra in nature.
- The crystal formations resembled irregular decahedra.
- Engineers sometimes use decahedra as structural elements in complex designs.