Difference between revisions of "Points, Lines, Segments, Angles etc."

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(New page: ==Points and Lines== A point is a specific location in space. A point is drawn as a dot. Often we label a point with some letter. We would say "Point A" for instance. [[Image:Dot.png|cent...)
 
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==Points and Lines==
 
==Points and Lines==
  
A point is a specific location in space. A point is drawn as a dot. Often we label a point with some letter. We would say "Point A" for instance.
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'''A point''' is a specific location in space. A point is drawn as a dot. Often we label a point with some letter. We would say "Point A" for instance.
 
[[Image:Dot.png|center|150px]]
 
[[Image:Dot.png|center|150px]]
 
Above you see three points labeled A, B and C.
 
Above you see three points labeled A, B and C.
  
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'''Lines''' are something you have seen in Algebra. Straight lines go on infinitely far in both directions. Closely related to the line are rays and line segments.
  
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'''A ray''' is what we can think of as "half a line". A ray starts at a given point and then goes of to infinity in one direction.
  
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'''A line segment''' is just a small part of a line. It starts at one point and ends at another.
  
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[[Image:Line-ray-segment.png|center|200px]]
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In the picture above we see the difference between a line, a ray and a segment. The line is the figure at the top. As we can see it goes on for ever. The figure in the middle is a ray. It starts at a point and then moves off to the top-right. The line segment is all the wayat the bottom.
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==Resources==
 
Ouside source: [[http://www.mathleague.com/help/geometry/basicterms.htm| Math League: Basic Terms]] Click on the link and look at the examples.
 
Ouside source: [[http://www.mathleague.com/help/geometry/basicterms.htm| Math League: Basic Terms]] Click on the link and look at the examples.

Revision as of 15:01, 4 January 2009

Points and Lines

A point is a specific location in space. A point is drawn as a dot. Often we label a point with some letter. We would say "Point A" for instance.

Dot.png

Above you see three points labeled A, B and C.

Lines are something you have seen in Algebra. Straight lines go on infinitely far in both directions. Closely related to the line are rays and line segments.

A ray is what we can think of as "half a line". A ray starts at a given point and then goes of to infinity in one direction.

A line segment is just a small part of a line. It starts at one point and ends at another.

Line-ray-segment.png

In the picture above we see the difference between a line, a ray and a segment. The line is the figure at the top. As we can see it goes on for ever. The figure in the middle is a ray. It starts at a point and then moves off to the top-right. The line segment is all the wayat the bottom.

Resources

Ouside source: [Math League: Basic Terms] Click on the link and look at the examples.