与圆有关的最值问题,是有一定的解题规律和技巧可遵循的.在分析、解决时,要特别注意灵活运用转化思想和数形结合的方法,使问题得以巧妙解决.题型一、过圆内某定点的直线被圆截得的弦长的最值问题由平几易知,弦最短过圆心和定点的直线垂直于弦;弦最长弦通过圆心.例1(2008年高考湖北理科第9题)过点 There is a certain problem-solving law and skills to be followed in analyzing and solving problems, paying special attention to the flexible application of the method of transforming ideas and numbers to make the problem cleverly solved. , The value of the chord of a straight line at a certain point within a circle is a straight line from the center of the string, the straight line of the chord with the shortest chin and the fixed point is perpendicular to the chord, and the longest chord of the chord passes through the center of the circle. Hubei college entrance examination in the 9th year) too much