论文部分内容阅读
圆既是轴对称图形,又是中心对称图形,也是初中平面几何的重要部分,在生产和生活中应用广泛．中考考查频率较高的内容主要有：点与圆的位置关系,运用垂径定理进行计算和证明,圆心角、圆周角、弧的度数之间的关系,圆内接四边形的性质,切线的性质和判定,圆和圆的位置关系,正多边形和圆的关系及有关计算,圆建模和圆应用等．本文结合2005年各省市中考题,根据《数学课程标准》的要求,分块讲述．
The circle is both an axisymmetric figure and a central symmetrical figure. It is also an important part of the plane geometry of junior high school. It is widely used in production and life. The contents of higher examinations in the examination mainly include: the positional relationship between the points and the circle. The vertical theorem is used to calculate and prove the relationship between the central angle, the circumferential angle and the degree of the arc, the nature of the circle inscribed in the quadrilateral, and the nature of the tangent. And determination, the relationship between the circle and the circle, the relationship between the regular polygon and the circle and related calculations, circle modeling and circle applications. This article combines the examination questions of various provinces and cities in 2005, according to the requirements of the “Mathematics Curriculum Standards”.