勾股定理及其逆定理是中学数学中几个重要的定理之一,它体现了由“形”到“数”和由“数”到“形”的数形结合思想.勾股定理在解决三角形的计算、证明和解决实际问题中得到广泛应用,勾股定理的逆定理常与三角形的 The Pythagorean Theorem and its Inverse Theorem are one of the most important theorems in middle school mathematics. They embody the number-form from “form ” to “number ” and from “number ” to "form Combined with the idea of ​​Pythagorean theorem in solving the calculation of the triangle to prove and solve practical problems have been widely used, the Pythagorean theorem inverse theorem often associated with the triangle