Pyramids have some triangular faces.
It could either be a triangular prism or a pentagonal pyramid
A hexagon, a triangular prism, a pentagonal pyramid, two-quadrilateral pyramids attached by their quadrilateral faces are some options. Take your pick!
PYRAMID
There are five Platonic solids: Tetrahedron (or triangular pyramid): 4 triangular faces Cube: 6 square faces Octahedron: 8 triangular faces Dodecahedron: 12 pentagonal faces Icosahedron: 20 triangular faces. Although not a Platonic solid, some people consider a sphere to be a regular 3d shape.
Pyramids have some triangular faces.
It could either be a triangular prism or a pentagonal pyramid
A hexagon, a triangular prism, a pentagonal pyramid, two-quadrilateral pyramids attached by their quadrilateral faces are some options. Take your pick!
PYRAMID
they are: ---sided pyramids and triangular prisms and 20 sided 3d shapes
In 2 dimensions, a heptagon. In 3 dimensions a hexagonal pyramid, a pentagonal dipyramid and some other exotic shapes - eg shape with one triangular base and one quadrilateral base and miscellaneous faces joining them.
A shape that has some triangular faces is a pyramid.
There are five Platonic solids: Tetrahedron (or triangular pyramid): 4 triangular faces Cube: 6 square faces Octahedron: 8 triangular faces Dodecahedron: 12 pentagonal faces Icosahedron: 20 triangular faces. Although not a Platonic solid, some people consider a sphere to be a regular 3d shape.
There are infinitely many such shapes. A tetrahedron, truncated hexahedron, icosahedron, pyramids, anti-prisms are some examples.
Some forms of hexahedra. An extreme [regular] example is a cube.
A regular dodecahedron does not but it is possible to have a dodecahedron with some triangular faces.
There are infinitely many polyhedra with one or more triangular faces.