过圆x的平方+外y的平方=4外一点P(4,2)坐圆的两条切线,切点为A,B,则三角形ABP的外接圆的方程为
人气:210 ℃ 时间:2020-02-05 12:52:59
解答
圆心为OP中点Q,半径R=|OP|/2
|OP|²=2²+4²=20
Q(2,1),R²=5
△ABP的外接圆的方程为:
(x-2)²+(y-1)²=5
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