Examine geometry first hand by using this web activity to solve the problem
of creating five squares by arranging twelve toothpicks. To move a toothpick,
click on it with the mouse and drag it to the desired location. You may also rotate a toothpick
by 90 degrees if you click on the toothpick and then press 'R' on the keyboard. When you are finished
creating the five squares be prepared to describe to others where each of the five
Clue: A square doesn't necessarily have to be 1x1 toothpicks in size.
(P. 128, Merrill Algebra 2: With Trigonometry)
Applet Source toothpick.java,
Written by Nicholas Exner.