Question 1204916
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How many distinct line segments are formed by connecting 20 collinear points?
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<pre>
Every point from this set of 20 points is connected by the line segments with 19 other points.


So, the number of all possible connections is  20*19 = 380.


Each such connecting segment  is counted twice at this way of counting.


So, we need divide 380 by 2 to get the answer  {{{380/2}}} = 190.


<U>ANSWER</U>.  190 segments.
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Solved.