A tetrahedron has 4 triangular faces

Yes, that's correct! A tetrahedron is a type of polyhedron that has four triangular faces. It is one of the simplest three-dimensional shapes and is classified as a type of pyramid with a triangular base. Here are some key characteristics of a tetrahedron: 1. **Vertices**: A tetrahedron has 4 vertices (corners). 2. **Edges**: It has 6 edges (the line segments where the faces meet). 3. **Faces**: As you mentioned, it has 4 triangular faces. 4. **Types**: A regular tetrahedron has all faces that are equilateral triangles, and all edges are of equal length. Tetrahedra can be found in various fields, including chemistry (where they can represent molecular shapes) and mathematics (in geometry and topology).