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-- The beginning point of a line can be any one of the 10 points. For each of these ...

-- The end point of the line can be any one of the remaining 9 points.

So there are (10 x 9) = 90 ways to form a line with 2 of 10 non-colinear points.

But once a line is drawn, there's no difference between it and the one that was drawn in the opposite direction between the same two points. So the 90 ways of forming lines actually produce (90 / 2) = 45 unique line segments.

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Q: How many straight lines can be formed with 10 non collinear points?
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Related questions

How many straight lines can be formed with 3 collinear points?

only 1 lines can contain 3 collinear points. Maybe you mean coplanar?


What does it mean for two points to be collinear?

"Collinear" means "on the same straight line".Two points are always collinear, because you can always draw a straight linebetween any two points. Three points may or may not be collinear.


What is the definition of non collinear lines?

The definition of a non-collinear line is that this is a line on which points do not lie on one line. The opposite of this is a collinear point. Collinear points refer to three points that do fall on a straight line.


How many different lines can be formed by three non-collinear points?

Three


For 3 non collinear points how many straight lines can be drawn?

3 lines and one plane


Can nine straight lines can be drawn from nine collinear points?

Yes. You can draw infinitely many straight lines from each point.


How many straight lines can be formed out of 10 points of which 7 are collinear?

If only 7 are colinear, then the question implies the lines need not go through every point. In that case there is an infinity of lines for each point.


Points that lie on the same line are called?

Collinear lines lie on the same straight line


How to find out if two sets of points are collinear need help for geometry?

To determine if two sets of points are collinear, you can calculate the slopes of the lines formed by connecting the points in each set. If the slopes are equal, then the points are collinear. Another method is to calculate the area of the triangle formed by the three points in each set. If the area is zero, then the points are collinear. Lastly, you can use the determinant of a matrix method to check if the points lie on the same line.


Are complanar points collinear?

Not sure about complanar. Coplanar lines can be collinear but need not be.


What is it called when two collinear lines meet?

Collinear lines lie on the same straight line passing through the same points and they are coplanular lines when meeting on the same plane.


Can you give an example of collinear point?

As defined by Math Open Reference: collinear points are points that lie on the same line. Any series of points with a yvalue of 4, for example, will be collinear since they lie on the same line. Lines formed by collinear points can have any slope and be located anywhere on a co-ordinate plane. The Math Open Reference link shows a working visual example of collinear points.