- Triakis icosahedron
A

**triakis icosahedron**is an Archimedean dual solid, or aCatalan solid . Its dual is thetruncated dodecahedron .It can be seen as an

icosahedron with triangular pyramids augmented to each face. This interpretation is expressed in the name.This interpretation can also associated with other similar nonconvex polyhedra with pyramids of different heights:

# (Sometimes called a**triakis icosahedron**)

# (With very tall pyramids)

# (With inverted pyramids)**See also***

Triakis triangular tiling for other "triakis" polyhedral forms.**References*** (Section 3-9)

***External links***

* [*http://polyhedra.org/poly/show/40/triakis_icosahedron Triakis Icosahedron*] -- Interactive Polyhedron Model

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