Question

What is Euler's formula
When we use might or may

Answer 1

Answer:

Euler's formula, Either of two important mathematical theorems of Leonhard Euler. The first is a topological invariance (see topology) relating the number of faces, vertices, and edges of any polyhedron. It is written F + V = E + 2, where F is the number of faces, V the number of vertices, and E the number of edges.

When F, E & V one of it will be missing. Then we will use Euler's formula.