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初中数学“圆”是初中几何教学中的重要内容,而切线的性质与判定又是这一章节的重点和难点,切线的性质与判定用法灵活而多变。常常与其他知识点联系在一起,变成综合性题目。在分析问题时若能巧妙的运用切线知识点,就能找到解题的突破口,可以使很多问题化复杂为简单,化深奥为浅显,为问题顺利解答起到关键性作用。
Junior high school mathematics “round ” is an important content in junior high school geometry teaching. The nature and judgment of tangents are the key points and difficulties in this chapter. The nature and judgment of tangential lines are flexible and changeable. Often linked with other knowledge points, into a comprehensive topic. If we can cleverly use tangential knowledge points to analyze problems, we can find a breakthrough point for solving problems, which can make many problems complicated and simple and profound, and play a key role in the smooth solution of the problem.