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Geometry Terms
types of lines, polygons, and angles
| Term | Definition |
|---|---|
| point | an exact location in space; named by a capital letter |
| line segment | a part of a line with two endpoints, named by the two endpoints |
| ray | a part of a line with one endpoint that extends forever in one direction; named by the endpoint first followed by another point on the ray |
| line | a straight mark that doesn't end |
| perpendicular lines | two lines cross and make a 90 degree angle |
| parallel | lines the same distance apart, they never meet |
| polygon | a closed plane shape with 3 or more straight sides |
| regular polygon | a polygon where all sides and angles are equal |
| irregular polygon | a polygon where all sides and angles are not equal |
| parallelogram | a quadrilateral whose opposite sides are parallel |
| quadrilateral | a polygon with 4 straight sides |
| angle | the space between two rays |
| obtuse angle | an angle that is greater than 90 degrees and less than 180 degrees |
| right angle | a 90 degree angle |
| acute angle | an angle that is less than 90 degrees |
| protractor | a tool used for measuring and drawing angles |
Created by:
Marquisgr4
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