chapter 9 vocab Flashcards
The angle through which a preimage is rotated to form the image
angle of rotation
a fixed point around which shapes move in a circular motion to a new position
center of rotation
a transformation that enlarges or reduces the original figure proportionally
dilation
a figure that results from the transformation of geometric figures
image
a mapping for which the original figure and it’s image are congruent
isometry
A line that can be drawn through a plane figure so that the figure on one side is the reflection image of the figure on the opposite side
line of symmetry
the graph of an object before a transformation
preimage
a transformation representing the flip of a figure over a point, line, or plane
reflection
a transformation that turns every point of a preimage through a special angle and direction about a fixed point, called the center of rotation
rotation
A figure has symmetry if there exists a rigid motion-reflection, translation, rotation, or glide reflection- that maps the figure onto itself
symmetry
a pattern that covers a plane by transforming the same figure or set of figures so that there are no overlapping or empty space.
Tessellation
In a plane, a mapping for which each point has exactly one image point and each image point has exactly one preimage point
transformation
A transformation that moves a figure the same distance in the same direction
translation
