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| Math Central | Quandaries & Queries |
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Question from Izsak: What is the formula to find the number of segments that can be named by a given number of points on a line? |
Hi Izsak,
A line segment is determined by two different points on the line. The segment consists of the two points and all points between them.
If you have $n$ points on the line how many ways are there to select two of them for the endpoints of a segment? How many segments are there?
Penny
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