| A | B |
|---|
| reflection | A transforamtion representing a flip of the figure overa point, line or plane |
| translation | A transformation that moves all points of a figure that same distance in the same direction |
| rotation | A transformation that turns every point of a preimage throug a specified angle and direction about a fixed point, called the center of rotation |
| tessellation | A pattern that covers a plane by transforming the same figure or set of figures so that there are no overlapping or empty spaces. |
| dilation | a trnsformation determined by a center point C and a sale factor K. |
| vector | A directed segment representing a quantity that has both magnitude, or length, and direction. |
| line of reflection | A line through a figure that separates the figure into two mirror images |
| isometry | A mapping for which the original figure and its image are congruent |
| transformation | In a plane, a mapping for which each point has exactly one image point and each image point has exactly one preimage point. |
| line of symmetry | A line that can be drawn through a plane figure so that the figure on one side is the reflection image of the figure on the opposite side. |
| point of symmetry | The common point of reflectio for all points of a figure |
| composition of reflections | successive reflections in parallel lines |
| glide reflection | A composition of a translation and a reflection in a line parallel to the direction of the translation |
| center of rotation | a fixed point araound which shapes move in a circular motion to a new position |
| angle of rotation | the angle through which a preimage is rotated to form the image |
| rotational symmetry | If a figure can be rotated less than 360 degrees about a point so that the image and the preimage are indistinguishable, the figure has rotational symmetry. |
| direct isometry | An isometry in which the image of a figure is found by moving the figure intact within the plane. |
| indirect isometry | An isometry that cannot be performed by maintaining the oreientation of the points, as in a direct isometry. |
| invariant points | points that do not change position under a transformation |
| regular tesselation | A tessellation formed by only one type of regular polygon. |
| semi-regular tesselation | A uniform ressellation formed using two or more regular polygons. |
| component form | vector expressed as an ordered pair |
| resultant | The sum of two vectors. |
| scalar | A constant multiplied by a vector. |
| scalar multiplication | Multiplicaion of a vector by a scalar. |
| column matrix | a matrix containing one column often used to represent an order pair or a vector |
| vertex matrix | A matrix that represents a polygon by placing all of the column matrices of the coordinates of the vertices into one matrix. |
| translation matrix | A matrix that can be added to the vertex matrix of a figure to find the coordinates of the translated image. |
| reflection matrix | A matrix that can be multiplied by the vertex matrix of a figure to find the coordinates of the reflected image. |
| rotation matrix | A matrix that can be multiplied by the vertex matrix of a figure to find the coordinates of the rotated image. |
