They are the faces of the polyhedron.
A polyhedron with 20 faces is called an icosahedron.
They are its faces.
faces
There is not a term for a polyhedron with 2 congruent faces. There are multiple polyhedra with 2 congruent faces.
In general, any 10-sided polyhedron is called a decahedron. With 10 regular triangles for faces, you may have a pentagonal bipyramid.
They are the faces of the polyhedron.
A polyhedron with 20 faces is called an icosahedron.
A Prismthe faces are called bases
A polyhedron can have any number of faces 4 or higher.
A right prism is a polyhedron that has 2 congruent faces which are sometimes called bases.
An eight-face polyhedron is called an octahedron.
Tetrahedron
They are its faces
They are its faces.
faces
A polyhedron with 20 faces is called an icosahedron.