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geometry c1
| Term | Definition |
|---|---|
| undefined term | words that don't have formal definitions but there is agreement is agreement about they mean in geometry the words point line and plane are this type of word |
| point | A location in space that is represented by a dot and has no dimension |
| line | one dimensional geometric figure that extends in two opposite directions without end |
| plane | A flat surface made up of points that has two dimensions and extends without without end and is represented by a shape that looks like a floor or wall |
| collinear points | points that lie on the same line |
| coplanar points | points that lie in the same plane |
| defined terms | terms that can be described using known words such as point or line |
| line segment | consists of two endpoints and all the points between them |
| endpoints | points that represent the ends of a line segment or ray |
| ray | a geometric figure that consists of the endpoint A and all points on line AB that lie on the same side of point as point B |
| opposite rays | lf point C lies on AB between A and B then ray CA and raycCB are opposite |
| intersection | the set of points two or more geometric figures have in common |
| postulate | a rule that is accepted without proof |
| axiom | a rule that is accepted without proof |
| coordinate | a real number that corresponds to a point on a line |
| distance | the absolute value of the difference of two coordinates on a line |
| construction | a geometric drawing that uses a limited set of tools usually a compass and a straightedge |
| congruent segments | line segments that have the same length |
| midpoint | the point that divides a segment into two congruent segments |
| segment bisector | a point ray line line segment or plane that intersects the segment at its midpoint |
| convex polygon | a polygon in which no line that contains a side of the polygon contains a point in the interior of the polygon |
| concave polygon | a polygon in which at least one line that contains a side of the polygon contains a point in the interior of the polygon |
| polygon | a closed plane figure formed by three or more line segments |
| side | line segments that form polygons |
| vertex | intersection of line segments that form geometric figures |
| angle | a set of points consisting of two different rays that have the same endpoint |
| sides of an anhle | the rays of an angle |
| interior of an angle | the region that contains all points between the sides of an angle |
| exterior of an angle | the absolute value of the difference greater than 0 and less than 90 |
| measure of an angle | the absolute value of the difference between the real numbers matched with the two rays that form the angle on a protractor |
| acute angle | an angle that has a measure greater than 0 and less than 90 |
| right angle | an angles that has a measure of 90 |
| obtuse angle | an angle that has a measure greater than 90 and less than 180 |
| straight angle | an angle that has a measure of 180 |
| congruent angle | two angle that have the same measure |
| angle bisector | a ray that divides an angle into two angles that are congruent |
| protractor | a tool that helps you approximate the measure of an angle |
| degrees | a unit of measurement of angles |
| complementary angles | two angles whose measures have a sum of 90 |
| supplementary angles | two angles whose measures have a sum of 180 |
| adjacent angles | two angles that share a common vertex and side but have no common interinr points |
| linear pair | two adjacent angles whose noncommon sides are opposite rays |
| vertical angles | two angles whose sides for two pairs of opposite rays |
Created by:
angel47