题目内容
如图,在5×5正方形网格中,一条圆弧经过A,B,C三点,那么这条圆弧所在圆的圆心是 ( )
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A.点P | B.点Q | C.点R | D.点M |
B
试题分析:如图,在5×5正方形网格中,一条圆弧经过A,B,C三点,这条圆弧所在圆的圆心到A,B,C三点的距离相等,由题意可得P、R、三点到A,B,C三点距离不等,Q点到A,B,C三点距离相等,QA=
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点评:本题考查圆,学生解答本题的关键是掌握圆的概念和性质,运用圆的概念和性质从而判断出圆心是那点
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