18 terms

Transformations

Terms in this set (...)

pre-image
The original figure in a transformation.
image
The figure that results from a transformation.
triangle A'B'C'
Method of labeling a triangle that results from a transformation. Read as triangle A prime, B prime, C prime.
transformation
To change the properties of a shape.
rotation
A transformation that "turns" a figure about a fixed point at a given angle and a given direction.
translation
A movement (slide) of a figure along a straight line.
reflection
A transformation that "flips" a figure over a mirror or reflection line.
dilation
A transformation that changes the size of an object, but not the shape.
clockwise
in the same direction as the rotating hands of a clock
counter-clockwise
In the direction opposite to the rotation of the hands of a clock.
90 degree rotation counter - clockwise
Triangle A'B'C' is the new (rotated) image.
90 degree rotation clockwise
Quadrilateral A'B'C'D' is the new (rotated) image.
180 degree rotation
Triangle A'B'C' is the new (rotated) image.
reflection across the y-axis
Triangle A'B'C' is the new (reflected) image.
reflection across the x-axis
Quadrilateral A'B'C'D' is the new (reflected) image.
Vertical translation
An up or down slide; the y-coordinate changes.
Horizontal translation
A slide to the right or left; the x-coordinate changes.
bisect
to cut in half