Transformations
An operation that moves or changes a geometric figure in some way to produce a new figure
pre-image and image
The original image BEFORE a transformation is performed. The image AFTER a transformation is performed and is indicated by prime marks.
Translation
A figure that slides from one position to another without turning it.
Reflection
The mirror image produced by flipping a figure over a line
Rotation
A transformation in which a figure is turned about a fixed point
Dilation
A transformation that changes the size of an object, but not the shape.
Similar
Figures that have the same shape but not necessarily the same size
Congruent
Having the same size and shape
Scale Factor
How big or small the image is from the pre-image. You multiply the coordinates of each vertex. The units must be the same. The ratios of the lengths of 2 corresponding sides of 2 similar polygons.