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一、考点说明1.圆的综合题中与圆有关的考点:圆周角定理、圆心角;切线的判定与性质;点和圆的位置关系;圆内接四边形的性质;扇形的面积、弧长公式;垂径定理.2.与其综合的考点:圆可以于初中数学大部分内容综合,内容丰富,题型多变.3.涉及的数学能力:推理和计算的能力;作辅助线;熟练运用勾股定理和相似比进行几何计算;将函数问题转化为方程问题;构建全等三角形.
First, the test center description 1 Round of comprehensive questions in the test center and the circle: the circular angle theorem, the central angle; tangential determination and nature of the location of the point and the circle; circular quadrilateral nature; sector area, arc length Formula; vertical theorem .2 with its comprehensive test center: the circle can be in the junior high school mathematics most of the content is comprehensive, rich in content, subject type changeable .3 mathematical ability involved: the ability of reasoning and calculation; as auxiliary line; skilled use Pythagorean theorem and the similarity ratio of geometric calculation; the function of the problem into equation problems; to build congruent triangles.