## Enter 2 of the 3 below

A planar graph has:

12 edges and 6 faces.

Calculate the number of vertices using

Eulers Formula for Planar Geometry

## Eulers Formula

Draw a planar graph

without any edge intersections

with v vertices, e edges and f faces

v - e + f = 2.

## Calculate v

Rearrange Eulers Formula

v = e - f + 2

v = 12 - 6 + 2

v = 6 + 2

v = **8**

### How does the Eulers Formula for Planar Geometry Calculator work?

This calculator solves for any one of the 3 following items using Eulers Formula for planar geometry:

* Vertices (v)

* Faces (f)

* Edges (e)

This calculator has 3 inputs.

### What 1 formula is used for the Eulers Formula for Planar Geometry Calculator?

- v - e + f = 2

where v = vertices, e = edges, and v = faces

For more math formulas, check out our

Formula Dossier
### What 4 concepts are covered in the Eulers Formula for Planar Geometry Calculator?

- euler
- Famous mathematician who developed Euler's constant
- eulers formula for planar geometry
- shape
- vertices
- Multiple vertexes

### Example calculations for the Eulers Formula for Planar Geometry Calculator

## Eulers Formula for Planar Geometry Calculator Video

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