Geometric Transformation Vocabulary

A function that describes a change in the LOCATION, ORIENTATION, or SIZE of a figure

• preimage

• transformation

• image

• reflection

A figure resulting from a transformation; the OUTPUT of a transformation

• image

• preimage

• reflection

• rotation

A line that a figure is FLIPPED across to create a MIRROR image of the original figure

• rotation

• preimage

• line of reflection

• image

A transformation that TURNS a figure around a given point

• translation

• reflection

• preimage

• rotation

The original figure in a transformation, the INPUT of a transformation

• preimage

• translation

• reflection

• rotation

A transformation that SLIDES a figure along a straight line.

• preimage

• transformation

• translation

• rotation

A transformation that FLIPS a figure across a line.

• rotation

• reflection

• image

• center of rotation

The point about which a figure is rotated.

• similar figures

• congruent figures

• rotation

• center of rotation

Translations, reflections and/or rotations; having the SAME SHAPE, SIZE. Corresponding ANGLE and LENGTHS are equal.

• congruent figures

• rotation

• reflection

• similar figures

Translations, reflections, rotations, and dilations having the SAME SHAPE, but not necessarily the same SIZE, corresponding measures are equal but side LENGTHS are proportional.

• translations

• similar figures

• congruent figures

• rotation