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圆是一种重要的几何图形.由于点、线与圆的位置关系有多种可能,常会出现多解的情况.因此,解答圆的有关问题时,一定要仔细分析,分类讨论,逐一解答,切忌因思维定势或考虑不周而漏解.现就圆中多解问题举例解析如下,供你学习时参考:一、点与圆的位置关系不确定产生多解例1(2013年盘锦卷)一个点到圆的最大距离为11cm,最小距离为5cm,则圆的半径为().A.8cm B.3cm C.8cm或3cm D.16cm或6cm
The circle is an important geometric figure. Since there are many possible relationships between the positions of points, lines and circles, multiple solutions often occur. Therefore, when analyzing the related problems of circles, we must carefully analyze, classify and discuss the problems one by one, Avoid thinking or trendsetting or ill-considered and leaked solution. Now many examples of solutions to problems in the circle as follows, for your reference: First, the relationship between the point and the circle of uncertainty to produce more solutions 1 (2013 Panjin volume ) A point to the circle of the maximum distance of 11cm, the minimum distance of 5cm, the radius of the circle (). A.8cm B.3cm C.8cm or 3cm D.16cm or 6cm