there are 10 points on a plane ,and any arbitrary three poin

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there are 10 points on a plane ,and any arbitrary three points are not in a straight line.
segments or not,linking any two points .In order to make sure that any point in these ten points can arrive at any other points by the linking line segments,how many line segments between two points should be linked at least?
不是翻译，是做题，不用英语回答。

一个面上有10个点,其中任意三个点不在一条直线上.
两个点之间可以用线段连接.
为了使平面上的任意一个点可以通过连接线段到达另外任意一个点,最少应该有多少条连接线段?
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9条线段,保证所有的的点都连起来就可以.

英语翻译The coordinates of the three points A,B,C on the plane a (1) The coordinates of the three points A,B C on the plane a 英语翻译Let A ,B and C be three points in a plane,such that AB/B 英语翻译Any 2 points determine a line ..if there are 6 points in 英语翻译Are there any points or motions on the floor 翻译,急 .There are three men on a train.Mr A speaks English and Chin There( ) a door and three windows() the wall.A is,on B are,o there are three points setting the backcloth of this transit There are an apple ,a pear and three bananas on table. there are three kites and a big clock on the wall怎么变疑问句 There is a pen and three apples on the desk.为什么用is不用are? There are three windows and a door the wall填on还是in?