## Enter 2 of the 3 below

<-- Vertices
<-- Faces
<-- Edges

A planar graph has:
4 faces and 5 vertices.
Calculate the number of edges using
Eulers Formula for Planar Geometry

A planar graph has:

4 faces and 5 vertices.

Calculate the number of edges using

Eulers Formula for Planar Geometry

##### Eulers Formula Drawing

Draw a planar graph

Include zero edge intersections

with v vertices, e edges and f faces

v - e + f = 2

##### Calculate e

Rearranging Eulers Formula

e = v + f - 2

e = 5 + 4 - 2

e = 9 - 2

e = 7

#### You have 2 free calculationss remaining

e = 7
##### How does the Eulers Formula for Planar Geometry Calculator work?
Free Eulers Formula for Planar Geometry Calculator - 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