以下命题中,正确的有__________ .
(1)过三点一定有一个圆;(2)同弧所对的圆周角相等;(3)直径所对的圆周角是直角;(4)平分弦的直径垂直弦,并且平分弦所对的两段弧;(5)相等的弦所对的圆周角相等;(6)三角形的外心是三内角角平分线交点;(7)三角形的内心是三内角角平分线交点; (8)圆心到直线上一点的距离等于半径,则直线是圆的切线.
(1)过三点一定有一个圆;(2)同弧所对的圆周角相等;(3)直径所对的圆周角是直角;(4)平分弦的直径垂直弦,并且平分弦所对的两段弧;(5)相等的弦所对的圆周角相等;(6)三角形的外心是三内角角平分线交点;(7)三角形的内心是三内角角平分线交点; (8)圆心到直线上一点的距离等于半径,则直线是圆的切线.
更新时间:2020-09-25 07:17:47
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