Theorem of Pythagoras a^2 + b^2 = c^2

    This java applet shows you (automatically - step by step)

      How ancient Chinese people discovers the same theorem.

      (much earlier than Pythagoras).

    You can change the interval delta T (in second, default value = 2 second).

    Click mouse button for manual control mode :
     

      Click right mouse button : show the following step

      Click left mouse button : show the previous step

    When you reach the last step, Press reset button to restart