1. The problem asks: How many triangles are there in an octahedron? 2. An octahedron is a type of polyhedron with 8 triangular faces and 6 vertices. 3. By definition, an octahedron has exactly 8 triangular faces. 4. Each face is a triangle, so the total number of triangles is 8. 5. Therefore, the answer is 8 triangles.