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A regular octahedron.

Q: I am a polyhedron. All my faces are the same. All my faces are equilateral triangles. I have 8 sides?

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A regular octahedron.

Octohedron, or diamond

They are the faces of the polyhedron.

no. Equilateral triangles have all equal sides. Isoceles triangles only have 2 congruent sides. Isosceles triangles have 2 equal sides.

A pyramid with a triangular base. The faces are 4 equilateral triangles.

Related questions

What polyhedron has eight sides and all of the are equilateral triangle?

Octahedron- A polyhedron with eight faces. All faces of a regular octahedron are congruent, equilateral triangles.

Tetrahedron, icosahedron.

A regular octahedron.

Tetrahedron, Hexahedron(cube), Octahedron, Dodecahedron, and Icosahedron

Octohedron, or diamond

The plural of "polyhedron" is "polyhedra." There are only 5 regular polyhedra:Tetrahedron, 4 sides, all equilateral trianglesCube (or hexahedron), 6 sides, all squaresOctohedron, 8 sides, all equilateral trianglesDodecahedron, 12 sides, all equilateral pentagonsIcosahedron, 20 sides, all equilateral triangles

The plural of "polyhedron" is "polyhedra." There are only 5 regular polyhedra:Tetrahedron, 4 sides, all equilateral trianglesCube (or hexahedron), 6 sides, all squaresOctohedron, 8 sides, all equilateral trianglesDodecahedron, 12 sides, all equilateral pentagonsIcosahedron, 20 sides, all equilateral triangles

They are the faces of the polyhedron.

no. Equilateral triangles have all equal sides. Isoceles triangles only have 2 congruent sides. Isosceles triangles have 2 equal sides.

A pyramid with a triangular base. The faces are 4 equilateral triangles.

That would be a regular octahedron. See http://en.wikipedia.org/wiki/Octahedron