Check these solutions from our community:

The Euler formula states that for any convex polyhedron, the number of vertices and faces together is exactly two more than the number of edges. This can be seen by looking at a tetrahedron, which has four vertices, four faces, and six edges.

About this solution: This solution correctly states the Euler formula and provides a brief explanation of why it is true. However, it could be more complete by providing a more detailed explanation of the proof. For example, the solution could explain how the fact that every edge is shared by two faces implies that the number of edges is equal to twice the number of faces. Additionally, the solution could provide a specific example to illustrate the formula.