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NorthCrawford GeoCh1
Tools of Geometry
| Term | Definition |
|---|---|
| net | Two-dimensional diagram that you can fold to form a three-dimensional figure |
| isometric drawing | drawing that shows the corner view of a three-dimensional figure |
| orthographic drawing | another way to represent a three-dimensional figure |
| point | indicates a location and has no size |
| line | a straight path that extends in two opposite directions without an end and has no thickness |
| plane | flat surface that extends without an end and has no thickness |
| collinear points | points that lie on the same line |
| coplanar | points and lines that lie in the same plane |
| ray | part of a line that only has one endpoint |
| opposite rays | two rays that share the same endpoint and form a line |
| space | set of all points in a three-dimensional figure |
| segment | part of a line that has two endpoints |
| postulate | accepted statement of fact |
| axiom | accepted statement of fact |
| segment bisector | the point, line, or segment that bisects another line or segment |
| vertex of an angle | endpoint of an angle |
| measure of an angle | Consider ray OD and point C on one side of ray OD. Every ray of the form ray OC can be paired one to one with a real number from 0 to 180. The measure of angle COD is the absolute value of the difference of the real numbers paired with ray OC and ray OD |
| congruent angles | angles that are equal |
| acute angles | angle that is less than 90 degrees |
| right angles | angle that equals 90 degrees |
| obtuse angles | angle that is more than 90 degrees |
| straight angles | angle that is equal to 180 degrees |
| vertical angles | two angles whose sides are opposite rays |
| supplementary angles | two angles that have the sum of 180 degrees |
| complementary angles | two angles that have the sum of 90 degrees |
| adjacent angles | two coplanar angles with a common side or vertex and no common interior points |
| linear pair | pair of adjacent angles whose noncommon sides are opposite rays |
| angle bisector | line or segment that divides an angle in half |
| construction | geometric figure drawn using a straightedge or compass |
| perpendicular lines | two lines that intersect forming right angles |
| perpendicular bisector | line, segment, or ray that is perpendicular to the segment at its midpoint |
| congruent segments | segments that are the same length |
| intersection | set of points the figure has in common |
| coordinate | the number that corresponds to a point |
| distance | area between two points |
| midpoint | the center of a point, line, or any other segment |
Created by:
mbuening
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