24.14圆的有关性质24.1.1圆................................................................................................................224.1.2垂直于弦的直径.......................................................................................1824.1.3弧，弦，圆心角.......................................................................................3624.1.4圆周角.......................................................................................................53周周测（五）................................................................................................................7224.2点和圆、直线和圆的位置关系24.2.1点和圆的位置关系...................................................................................9224.2.2直线和圆的位置关系..............................................................................107周周测（六）..............................................................................................................15624.3正多边形和圆..................................................................................................17824.4弧长和扇形面积24.4.1弧长和扇形面积......................................................................................19524.4.2圆锥的侧面积与全面积..........................................................................210小专题（三）圆的切线的证明..................................................................................225周周测（七）..............................................................................................................243
