Yes: the tetrahedron.
octahedron
it is afrog
tetrahedron
pyramid
diamond/octahedron
Octahedron- A polyhedron with eight faces. All faces of a regular octahedron are congruent, equilateral triangles.
octahedron
it is afrog
An octahedron.
tetrahedron
pyramid
octahedron
A deltahedron is a polyhedron which is composed of equilateral triangles as faces.
diamond/octahedron
You're an octagon.
Octohedron, or rhomboid.
A regular octahedron.