It is a triangular based pyramid
What polyhedron has eight sides and all of the are equilateral triangle?
You are a regular octahedron. An octahedron is a type of polyhedron that has eight faces, all of which are equilateral triangles. It is one of the five Platonic solids and has twelve edges and six vertices.
that's easy its a triangle * * * * * That is such a nonsensical answer! A triangle is not even a polyhedron. The correct answer is an octahedron - two square based pyramids stuck together along their bases.
pentagon
octahedron
An octahedron.
tetrahedron
An eight-face polyhedron is called an octahedron.
octahedron
You're an octagon.
A regular octahedron.
Octohedron, or rhomboid.