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直线与圆相切是直线和圆的位置关系中的重要一种,它在证题中占有举足轻重的地位,不少命题都涉及到它 .本文介绍判定直线与圆相切的几种常用方法,供读者参考.
The tangency between a straight line and a circle is an important one in the positional relationship between a straight line and a circle. It occupies a decisive position in the test. Many propositions involve it. This paper introduces several commonly used methods for determining the tangency of a straight line and a circle. For readers reference.