Geometry Vocab
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Created by:
otherthingsandstuff on August 2, 2011
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29 terms
Terms | Definitions |
|---|---|
 point | no dimension; represented by a point |
| line | one dimension; represented by line with two arrowheads |
| plane | flat surface made up of points that extend in all directions. One plane through any 3 points not on the same line. |
| definition | explained using undefined terms |
| collinear | points that lie in the same plane. |
| coplanar | points that lie in the same plane |
| line segment | can be measured because it has endpoints. |
| congruent segments | segments that have the same measure |
| midpoint | the point halfway between the endpoints of the segment |
| bisects | the action of any segment, line, or plane that intersects a segment at its midpoint |
| undefined terms | only explained using examples and descriptions |
| defined terms | explained using only undefined terms and/or other defined terms |
| locus | set of points that satisfy a particular condition |
| betweenness of points | for any two real numbers a and b, real number n is between a and b, so a < n < b |
| constructions | methods of creating geometric figures without the benefit of measuring tools |
| distance | the length between two points as the endpoints AB = (square root) (x2-x1)^2 + (y2-y1)^2 |
| irrational numbers | cannot be written as a quotient of two integers |
| ray | part of a line; one endpoint and extends indefinitely in one direction |
| opposite rays | two rays that share a common endpoint and go in opposite directions |
| angle | formed by two noncollinear rays that havea common endpoint |
| sides | the rays are called _____ of an angle |
| vertex | common endpoint |
| interior | inside of an angle |
| exterior | outside of an angle |
| degree | results from dividing the distance around a circle into 360 parts |
| right angle | 90 degree angle |
| acute angle | less than 90 degrees |
| obtuse angle | more than 90 degrees |
| angle bisector | a ray that divides an angle into two congruent angles |
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