Pick's Rule

 

Use this program to create your own polygon shapes on dotted grid paper to investigate Pick's formula that gives the area using the number of dots on the perimeter of the shape and the number of dots inside the shape.

 

Shapes are drawn by clicking on one dot at a time. Dots are automatically joined by a straight line. 

There is option for sound if you wish to also hear the answers.

 

After downloading, unzip the file and run the exe file.