2025年教学资料:6.4.2 圆的一般方程(分层作业)(解析版)
淘宝:中院研究所6.4.2圆的一般方程分层作业1.圆的圆心和半径分别( )A.,B.,5C.,D.,5【答案】A【分析】由题意将圆的一般方程化为标准方程,再求出圆心坐标和半径长.【详解】将方程化为标准方程:,则圆心坐标为,半径长等于.故选:A2.以,为直径两端点的圆的方程为( )A.B.C.D.【答案】A【分析】由中点坐标公式求出圆心坐标,两点间距离公式求出圆的直径,得解.【详解】,,的中点坐标为,以为直径的圆的圆心为,又,圆的半径为1,基础巩固1淘宝:中院研究所以为直径的圆的方程为即.故选:A.3.求以为圆心,且经过点的圆的一般方程( )A.B.C.D.【答案】C【分析】根...
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