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Geometry
What is it?
A line is defined as an infinite set of points forming a straight path, extending in both directions. It does not
have a beginning or an end.
A line segment is a part of a line, defined by two endpoints.
A ray is a part of line that has only one endpoint, and extends indefinitely in one direction.
NAMING LINES, LINE SEGMENTS AND RAYS
We typically name a line, line segment or ray using uppercase letters. For example:
Line AB
Line Segment EF
Ray GH
Regular Polygons
A regular polygon has lines that are all the same length and it also has all the same angles.
Examples:
Regular:
Not regular:
Congruent
Similar
Having the same size and shape
Same shape but different size
Example:
The PERIMETER is the distance around the edges.
Think: peRIMeter.
http://www.learner.org/interactives/geometry/3d_pyramids.html
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