A decahedron is a polyhedron having 10 faces. Examples include the 5-trapezohedron, augmented
pentagonal prism (Johnson solid 
), augmented
tridiminished icosahedron (
), nonagonal pyramid, pentagonal
dipyramid (
),
chamfered tetrahedron, octagonal prism,
octagonal dipyramid, square
antiprism, and square cupola (
), and ten-of-diamonds
decahedron.
