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Test 1 Vocabulary
| Term | Definition |
|---|---|
| Point | The basic unit of geometry. It has no size. It is infinitely small. It only has location. |
| Line | A straight arrangement of points. It contains an infinite number of points. It has length, but no thickness. It extends forever in two, opposite directions. |
| Ray | A straight arrangement of points. It contains an infinite number of points. It has length, but no thickness. It extends forever in one direction from a starting point. |
| Plane | A flat surface made up of points that extend forever. It has length and width, but no thickness. |
| Postulate | This is an accepted statement of fact. They are basic building blocks of the logic of geometry. They are used to prove concepts of geometry. |
| Absolute Value | This is the distance of a number from zero on the number line. |
| Segment Bisector | A point, line, ray, or other segment that divides a segment into two equal parts. |
| Vertical Angles | Two angles whose sides are opposite rays |
| Complementary Angles | Two angles whose measures have a sum of 90 degrees |
| Supplementary Angles | Two angles whose measures have a sum of 180 degrees |
| Linear Pair | A pair of adjacent angles whose noncommon sides are opposite rays. These angles form a straight line and are supplementary. |
| Perpendicular Bisctor | A line or ray that is perpendicular to a segment at its midpoint. |
| Pendicular Lines | Lines that intersect to form right angles. |
| Angle Bisector | A ray or segment that divides an angle into two congruent angles. |
| Right Angle | An angle that measures exactly 90 degrees. |
| Adjacent Angles | Angles that are next to each other and share the same ray. |
| Congruent Segments | This is what we would name two segments if those two segments have the same length. |
| Midpoint | A point that divides a segment into two congruent segments. |
| Angle | Two two rays with the same endpoint. |
| Vertex | The shared point of the two rays which make up an angle |
| Straight Angle | An angle that measures exactly 180 degrees. |
| Obtuse Angle | An angle that measures between 90 and 180 degrees. |
| Acute Angle | An angle that measures between 0 and 90 degrees. |
| Opposite Rays | Two rays that share the same endpoint and are on the same line. |
| Segment | Two points, and all the points in between them, that lie on a line containing the two points. The two points on the end are called the endpoints. |
| Intersection | The set of points two or more figures have in common |
| Segment Addition Postulate | If three points A, B, and C are collinear and B is between A and C, then AB + BC = AC |
| Congruent Angles | Angles with exactly the same measure. |
| Angle Addition Postulate | If point B is in the interior of ∠AOC, then m∠AOB+m∠BOC = m∠AOC |
Created by:
esisolak
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