This illustration provide students with seeing the properties of Euclid Theorem.
Squares and circle help you to see the rules of Euclid Theorem.
Thanks to this applet, you will easily be able to comprehend the equations.

Roll the circle with the helping of slider.
Examine and try to understand the figure.
Did you recognize path which is the half of the circumference of circle?
Click the "Show the Properties of Euclid" icon.
Examine the equations with the helping of icon which show the related shape and directions of equations.
Did you recognize where the Euclid Equations come from?