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
Pre-Algebra M1T1
Vocab for lessons 1 & 2
| Term | Definition |
|---|---|
| Congruent figures | figures that have the same size and shape; if two figures are congruent, all corresponding sides and all corresponding angles have the same measure |
| Corresponding sides | sides that have the same relative position in geometric figures |
| Corresponding angles | angles that have the same relative position in geometric figures |
| Plane | a flat surface; it has infinite length and width, but no depth; a plane extends infinitely in all directions in two dimensions and has no thickness; planes are determined by three points, but are usually named using one uppercase letter |
| Transformation | the mapping, or movement, of a plane and all the points of a figure on a plane according to a common action or operation |
| Rigid motion | a special type of transformation that preserves the size and shape of the figure |
| Pre-image | the original figure in a transformation is called the pre-image |
| Image | the new figure created from a transformation is called the image |
| Translation | a rigid motion transformation that “slides” each point of a figure the same distance and direction |
| Orientation of a figure | the direction in which a figure is placed on the plane |
| Orientation of the vertices | the order in which the vertices are labeled |
| Reflection | a rigid motion transformation that “flips” a figure across a line of reflection |
| Line of reflection | a line that acts as a mirror so that corresponding points are the same distance from the line |
| Rotation | a rigid motion transformation that turns a figure on a plane about a fixed point, called the center of rotation, through a given angle, called the angle of rotation |
| Center of rotation | the point around which a figure is rotated; the center of rotation can be a point outside the figure, inside the figure, or on the figure |
| Angle of rotation | the amount of rotation, in degrees, about a fixed point, the center of rotation |
Created by:
user-2050538
Popular Math sets