Difference between revisions of "Points, Lines, Segments, Angles etc."
(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...) |
|||
| Line 1: | Line 1: | ||
==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. | + | '''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. | ||
| + | '''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. | ||
| + | [[Image:Line-ray-segment.png|center|200px]] | ||
| + | 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: [[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.
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.
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.
