2018_2019学年九年级数学下册第2章圆2.5直线与圆的位置关系2.5.2圆的切线第1课时切线的判定课件(新版)湘教版.ppt

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2018_2019学年九年级数学下册第2章圆2.5直线与圆的位置关系2.5.2圆的切线第1课时切线的判定课件(新版)湘教版.ppt_第1页
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第1课时 切线的判定,知识目标,目标突破,第2章 圆,总结反思,知识目标,第1课时 切线的判定,目标突 破,目标一 理解切线的判定定理(1)直线与圆有公共点时证明直线是圆的切线,第1课时 切线的判定,第1课时 切线的判定,第1课时 切线的判定,第1课时 切线的判定,(2)直线与圆位置关系不明时证明圆的切线,第1课时 切线的判定,第1课时 切线的判定,第1课时 切线的判定,第1课时 切线的判定,目标二 掌握圆的切线的作法,第1课时 切线的判定,第1课时 切线的判定,第1课时 切线的判定,直径所对的圆周角是直角;,经过半径的外端并且垂直于这条半径的直线是圆的切线,第1课时 切线的判定,第1课时 切线的判定,总结反思,小结,知识点一 切线的判定定理,外端,垂直于这条半径,第1课时 切线的判定,第1课时 切线的判定,第1课时 切线的判定,知识点二 过圆上一点作圆的切线,第1课时 切线的判定,反思,第1课时 切线的判定,第1课时 切线的判定,第1课时 切线的判定,第1课时 切线的判定,

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