直角三角形直角边a、b的平方和,等于斜边c的平方,即a2+b2=c2。这就是我们所熟悉的勾股定理,它揭示了直角三角形三边之间的数量关系,利用它,不仅可以解决与直角三角形有关的计算问题,一些与斜三角形有关的计算问题也可通过添作垂线后获得解决.现以近几年的中考题为例说明如下. The sum of the squares of the right-angled sides a and b is equal to the square of the hypotenuse c, that is, a2+b2=c2. This is the Pythagorean Theorem that we are familiar with. It reveals the quantitative relationship between the three sides of a right-angled triangle. Using it, we can not only solve the calculation problems associated with right-angled triangles, but also some calculation problems related to oblique-angled triangles. After the vertical line is resolved. Now in recent years as an example of the exam as described below.