The cube appearing in the window above is built with 216 balls. You can obtain many other shapes by removing some of the balls it contains. To do so you have to chose a ball, point it with the mouse and click it.
If you accidentally remove a wrong ball you can make it reappear by clicking the [ back ] button
Removing some balls, try to built different regular 3D shapes you know and then check the number of the balls used. The actual quantity of the balls used is shown all the time by the counter on the left top side of the window.
After creating some regular shapes, try to calculate the number of the balls in use by applying some known formulas for the volume count.
Enjoy!
designed by Witold Wojcik