如果不和P重合的A.B.C三点到P点的距离相等,则点P是ABC的外心.
如果不和P重合的A.B.C三点到P点的距离相等,则点P是ABC的外心.
其他人气:848 ℃时间:2019-09-29 03:44:29
优质解答
以点P为圆心,以PA长为半径作圆,则此圆经过A,B,C三点,所以此圆是三角形的外接圆,点P是三角形ABC的外接圆圆心,也就是点P是ABC的外心.实质上点P是三角形三条边的垂直平分线的交点
我来回答
类似推荐
猜你喜欢
- 1.如图,延长线段AB到C,使BC=2\1AB,D为AC的中点,DC=2,求AB的长.
- 2求函数y=-1/x+2在区间[-5,-3]上的最大值和最小值 高一数学
- 3There is going to be a TV show about flowers toight 一般疑问句 The robot is going to sweep the stirs
- 4333333333333 之间加上四则运算符号等于2000?
- 5We don’t have to conclude that our efforts have all come to nothing
- 6摩擦力的大小和运动速度有什么关系?
- 7已知α,β是方程4x平方-4mx+m+2=0的两个实数根.当m为何值时,α平方+β平方有最小值?求出这个最小值.
- 8疲惫的近义词和反义词
- 9---Hi lucy!I can't find my English book,have you seen it___?---sorry,I haven't.Why not ask ben?Maybe he's seen it.A.some
- 10He said he would help me with my math if he ____ free.