First of all, A square is a four-sided polygon that has all sides equal in length and the measure of the angles is 90 degrees. How square is your world? This video will help you find out. There are many square videos on here. Find one that interests you and click on it to learn more about it. You can also learn what makes a circle different from a square by watching Steve Vai's amazing saxophone solo, "Echoes of the Past". Remember, make sure to turn on captions! Are you ready to explore...