These are vocabulary notecards for basic geometry terms in McDougal Littel Geometry book Chapter 1.
Terms : Hide Images
| 835497816 | point | A location. It is a point with no length, width, and thickness. | 1 | |
| 835497817 | line | infinite set of points that extends in two directions. It has length but no width or thickness. | 2 | |
| 835497818 | plane | infinite set of points that creates a flat surface that extends without ending. A plane has length and width but no thickness. | 3 | |
| 835497819 | space | the set of all points | 4 | |
| 835497820 | collinear | points on the same line | 5 | |
| 835497821 | non collinear | points not on the same lone | 6 | |
| 835497822 | coplanar | points in the same plane | 7 | |
| 835497823 | non coplanar | points not in the same plane | 8 | |
| 835497824 | equidistant | an equal distance from | 9 | |
| 835497825 | oblique plane | A plane that is not horizontal and not vertical | 10 | |
| 835497826 | segment | Two points on the line and all points between them. The two points are called the endpoints of the segment. | 11 | |
| 835497827 | length | A positive distance between two points. | 12 | |
| 835497828 | "XZ" | A representation of a number, showing length between two points. | 13 | |
| 835497829 | XZ (with line over) | A line segment between imaginary points X and Z. | 14 | |
| 835497830 | between | All points between a designated start and end point on the same line. | 15 | |
| 835497831 | opposite rays | Given three collinear points R, S, T: If S is between R and T, then ray SR and ray ST are opposite rays. | 16 | |
| 835497832 | postulate | A statement that is accepted without proof. | 17 | |
| 835497833 | congruent | Two objects that have the same size and shape. | 18 | |
| 835497834 | congruent segments | Segments that have equal lengths. | 19 | |
| 835497835 | midpoint of a segment | The point that divides the segment into two congruent segments. | 20 | |
| 835497836 | bisector of a segment | A lime, segment, ray, or plane that intersects the segment at its mid point. | 21 | |
| 835497837 | ray | Part of a line that consists of an endpoint and all points on the line that extend in one direction | 22 | |
| 835497838 | sides | two rays of angle | 23 | |
| 835497839 | vertex | common endpoint of sides of angle | 24 | |
| 835497840 | Acute angle | A triangle with three acute angles | 25 | |
| 835497841 | Right angle | An angle with measure 90. | 26 | |
| 835497842 | Obtuse angle | A triangle with one obtuse angle | 27 | |
| 835497843 | Straight angle | An angle with measure 180 | 28 | |
| 835497844 | Congruent angles | Angles that have equal measures. | 29 | |
| 835497845 | Adjacent angles | Two angles in a plane that have a common vertex and a common side but no common interior points. | 30 | |
| 835497846 | Bisector of an angle | The ray that divides the angle into two congruent adjacent angles. | 31 | |
| 835497847 | theorems | Statements that can be proved. | 32 | |
| 835497848 | exists | there is at least one | 33 | |
| 835497849 | unique | there is no more than one | 34 | |
| 835497850 | one and only one | exactly one | 35 | |
| 835497851 | determine | to define or specify | 36 | |
| 835497852 | "undefined" terms | intuitive ideas and are not defined | 37 | |
| 835497853 | intersection of two figures | set of points that are in both figures | 38 | |
| 835497854 | "two points" | different points | 39 | |
| 835497855 | "three lines" | different lines | 40 | |
| 835497856 | horizontal plane | a plane represented by a figure with two sides horizontal and no sides vertical | 41 | |
| 835497857 | vertical plane | a plane represented by a figure in which two sides are vertical | 42 | |
| 835497858 | coordinate of a point on a number line | On a number line every point is paired with a number and every number is paired with a point. | 43 | |
| 835497859 | angle | A figure formed by two rays that have the same endpoint. The two rays are called the sides of the angle. Their common endpoint is the vertex. | 44 | |
| 835497860 | linear pair | 2 angles form a linear pair if and only if: 1) they are adjacent angles and 2) their non-common sides are opposite rays. Note that the sum of the measures of two angles in a linear pair is 180. | 45 | |
| 835497861 | exists | There is at least one corresponding to condition specified. | 46 | |
| 835497862 | exactly one | one and only one | 47 |
