yepdunno
Their faces are equilateral triangles.
Equilateral triangles
Equilateral triangles
Equilateral triangles
octahedron
Octahedron- A polyhedron with eight faces. All faces of a regular octahedron are congruent, equilateral triangles.
octahedron
diamond/octahedron
An octahedron.
an octahedron
octahedron
It is a regular octahedron.