Wiggly Triangles
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# The Problem of the Right Wiggly Triangles

A 'wiggly triangle' is a three sided figure whose sides don't have
to be straight. They have angles at their corners and a 'right
wiggly triangle' is a wiggly triangle whose three corner angles add
up to 180 degrees.

A circle split into wiggly triangles. There are 9 faces - 8 triangles
plus the outside, 7 vertices and 14 edges.

The puzzle is in two parts which you should do in order:

### Part 1

First you have to show using the Euler-Descartes formula

faces + vertices = edges + 2

or otherwise that it is impossible to divide a circle into a
finite number of right wiggly triangles.

### Part 2

Your friends take you to a bunco booth, where the carnie
says he can divide up a circle as described above. Will you put
your money where your mouth is and bet against him, if only to
see what he has done. Or can you do the impossible? :)

There are Solutions here but have a go first.