Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Geometry Unit1 Vocab
| Term | Definition |
|---|---|
| What is the definition of scale factor of a dilation? | Describes the extent of a dilation. The ratio of a length on the image to a corresponding length on the preimage. |
| What is the definition of order of symmetry? | The number of times a figure maps onto itself as it rotates from 0 to 360 degrees. |
| What is the definition of magnitude of symmetry? | The smallest angle through which a figure can be rotated so that it maps onto itself. |
| What is the definition of invariant points? | The set of points that does not move under a transformation. |
| What is the definition of angle of rotation? | The angle through which a rotation is performed. |
| What is the definition of reflectional symmetry? | Symmetry where a figure can be mapped onto itself by a reflection in a line. |
| What is the definition of line of reflection? | The line over which a reflection is performed. |
| What is the definition of reflection? | Also known as a flip, a transformation over a line. Each point of the preimage and its image are the same distance from that line. |
| What is the definition of transformation? | An operation that maps an original image onto a new figure. |
| What is the definition of center of rotation? | The point around which a rotation is performed. |
| What is the definition of line of symmetry? | A line that can be drawn through a plane figure so that the figure on one side is a reflection of the figure on the opposite side. |
| What is the definition of similarity transformation? | A transformation that produces an image that is similar to the preimage. |
| What is the definition of glide reflection? | A composition of a translation followed by a reflection in a line parallel to the translation vector. |
| What is the definition of image? | The figure that results from a transformation. |
| What is the definition of preimage? | The original image before a transformation. |
| What is the definition of rotation? | Also known as a turn, a transformation around a fixed point, through a specific angle, and in a specific direction. |
| What is the definition of Rotational Symmetry? | Symmetry where a figure can be mapped onto itself by a rotation between 0 and 36 degrees about the center of the figure. |
| What is the definition of isometry? | A transformation in which the position of the image may differ from that of the preimage, but the two figures remain congruent. |
| What is the definition of Enlargement? | A dilation with a scale factor greater than 1. The image is larger than the preimage. |
| What is the definition of center of symmetry? | The point about which a figure is rotationally symmetrical. |
| What is the definition of translation? | Also known as a slide, a transformation that moves all points of the original figure the same distance in the same direction. |
| What is the definition of congruence transformation? | A transformation in which the position of the image may differ from that of the preimage, but the two figures remain congruent. |
| What is the definition of center of dilation? | The fixed point that dilations are performed in relation to. |
| What is the definition of dilation? | A transformation that enlarges or reduces the original figure proportionally. |
| What is the definition of reduction? | A dilation with a scale factor between 0 and 1. The image is smaller than the preimage. |
Created by:
Isam09