# Difference between revisions of "Pick's Theorem"

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where <math>I</math> is the number of lattice points in the interior and <math>B</math> being the number of lattice points on the boundary. | where <math>I</math> is the number of lattice points in the interior and <math>B</math> being the number of lattice points on the boundary. | ||

− | It is similar to the shoestring formula, and | + | It is similar to the shoestring formula, and although it is less powerful it is a good tool to have in solving problems. |

{{image}} | {{image}} |

## Revision as of 17:01, 28 July 2010

**Pick's Theorem** expresses the area of a polygon, all of whose vertices are lattice points in a coordinate plane, in terms of the number of lattice points inside the polygon and the number of lattice points on the sides of the polygon. The formula is:

where is the number of lattice points in the interior and being the number of lattice points on the boundary. It is similar to the shoestring formula, and although it is less powerful it is a good tool to have in solving problems.

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## Proof

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