decahedron

9.1

A solid shape with ten flat faces

noun
/ˌdɛkəˈhiːdrən/

Specialized

: decáhedro

In mathematics class, we studied how to calculate the surface area of a decahedron.

Examples

The decahedron has ten flat faces.
Unlike a cube, a decahedron has ten faces, making it more complex.
The geometric model on the table is a decahedron with clearly marked faces.
I built a decahedron using cardboard.
The teacher explained that a decahedron is a solid shape with ten flat faces.
In our geometry class, we constructed a model of a decahedron using cardboard.
During the art exhibition, I saw a sculpture designed as a decahedron with colorful patterns on its surfaces.

How Many Faces

icosahedron

Specialized

1 9.9

dodecahedron

Specialized

1 9.6

decahedron

Specialized

9.1

octahedron

Specialized

1 8.2

cube

130 1.0

tetrahedron

Specialized

2 7.6

Surface Forms

decahedron singular

decahedrons plural

Morphology

decahedron = hedron (semi-transparent) = deca + hedron

Built from Greek combining forms 'deca-' (ten) + '-hedron' (face/seat); the structure is regular for geometric terms but the individual combining forms may be unfamiliar to general learners.

Etymology

Decahedron comes from Greek parts deca- meaning 'ten', like in decade, and -hedron meaning 'face' or 'side', like in polyhedron. So a decahedron is a solid shape with ten flat faces.