Posted by **Katherine** on Monday, March 22, 2010 at 5:57pm.

you can draw one segment to connect two points and three distinct segments to connect three named points. how many segments can you drawto connect five points if no three of the points lie on the same line.........please help me i am confused

- math -
**Reiny**, Monday, March 22, 2010 at 7:38pm
A segment is created by joining any two points

So the question comes down to how many pairs of points can I form from 5 points.

This is a combination question

it would be 5choose 2 or C(5,2) = 10

Or

you could set up a pattern

points - lines

2 1

3 3 , an increase of 2

4 6 , an increase of 3

5 10 , and increase of 4 !!!! aha, there is the pattern

6 15 etc

## Answer This Question

## Related Questions

- math - you can draw one segment to connect two points and three distinct ...
- Math- How many points of intersection are there? - Let x1, x2,..., x20 be ...
- Congruence-creating a triangle - Three segments are given. I need to draw one ...
- math - A cube has 8 vertices. For each pair of distinct vertices, we connect ...
- Math Geometry - A cube has 8 vertices. For each pair of distinct vertices, we ...
- geometry - Decide which one of the following statements is false. a. any three ...
- geometry - Three line segments have the following measures: AB=6, BC= 3, and AC=...
- Math - We are learning about proofs. We drew lines between noncollinear points. ...
- geometry - We are learning about proofs. We drew lines between noncollinear ...
- MATHS - Four points lie in a plane. They are partitioned into two pairs so that ...

More Related Questions