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Unit 1 Vocabulary
Unit 1 - Transformations Vocabulary
| Term | Definition |
|---|---|
| point | An undefined term; it names a location and has no size. |
| line | An undefined term; A line is a straight path that has no thickness and extends forever. |
| plane | An undefined term; it is a flat surface that has no thickness and extends forever. |
| circle | The set of points in a plane that are a fixed distance from a given point called the center of the circle. |
| angle | A figure formed by two rays with a common endpoint. |
| perpendicular Line | Lines that intersect at 90° angles. |
| parallel Line | Lines in the same plane that do no intersect. |
| line segment | Part of a line that is bounded by two distinct endpoints. |
| bisector | Cuts an object into two equal parts. |
| congruent | Having the same size and shape, denoted by ≅ . |
| corresponding angles | Angles in the same position in two different polygons that have the same number of angles. |
| corresponding sides | Sides in the same position in two different polygons that have the same number of sides. |
| endpoint | A point at an end of a segment or the starting point of a ray. |
| intersection | A point at which two things intersect. |
| ray | |
| segment | |
| vertex | |
| angle of rotation | An angle formed by a rotating ray; called the terminal side, and a stationary reference ray, called the initial side. |
| image | A shape that results from a transformation of a figure know as the pre-image. |
| isometry | A transformation that does not change the size or shape of a figure. |
| pre-image | The original figure in a transformation. |
| reflection | |
| line of reflection | |
| rotation | |
| transformation | |
| translation | |
| horizontal stretch | |
| vertical stretch | |
| symmetry | |
| line symmetry | A figure that can be reflected across a line so that the image coincides with the pre-image. |
| rotational symmetry | A figure that can be rotated about a point by an angle less than 360° so that the image coincides with the pre-image. |
| order of rotational symmetry | The number of times a figure with rotational symmetry coincides with itself as it rotates 360°. |
| vector | A quantity that has both magnitude and direction. |
| dilation | A transformation that changes the size of a figure but not its shape. |
| rigid transformations | A transformation that does not change the size or shape of a figure. |
| isometric transformations | Transformations that don't change the size or shape of an object. Three types: Translations, Rotations, Reflections |
| corresponding parts | Refers to the parts of two objects that are in the same relative position. |
| coincide | To correspond exactly; to be identical. |
Created by:
AWarner
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