直角三角形的边和圆相切的中考试题,主要考查解直角三角形、辅助线添作、勾股定理、切线长定理、切割线定理以及灵活运用,并涉及到其它几何图形的性质应用。由于这一类题使圆和直角三角形的特殊性质得到充分体现,因此在各省市中考试题中频频出现。以下介绍直角三角形的边和圆相切的三种情形,供同学们学习参考 The examination questions of the right-angled triangle with the tangent to the circle mainly examine the right triangles, the auxiliary lines, the Pythagorean theorem, the tangent length theorem, the cutting line theorem, and the flexible use, and involve the application of the properties of other geometric figures. Because this kind of question makes the special nature of the circle and the right-angled triangle fully reflected, it appears frequently in examination questions in various provinces and cities. The following describes three cases where the sides of a right-angled triangle are tangent to the circle, for students to learn