勾股定理    

       “直角三角形斜边的平方等于两条直角边的平方和”叫做勾股定理，也称为毕达哥拉斯定理。这个定理已有两千多年的历史，是数学中应用最广泛的定理之一，也是证明方法最多的数学定理之一。观众通过翻转圆盘，使容器中液体流动以验证“勾股定理”。

PYTHAGOREAN THEOREM    

        The Pythagorean Theorem states that the sum of the squares of the lengths of the sides of a right triangle is equal to the square of the length of the hypotenuse. This theorem has a history of over 2000 years, and is one of the most widely used theorems in mathematics and a theorem with most proving methods as well.Overturn the disc to make the liquid in the container flow to verify Pythagorean Theorem.