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Rigid Transformation

8th grade Unit 1 vocab

TermDefinition
Rotation A turn around a center point. Does not change size or shape.
Translation A slide that does not change size or shape.
Reflection A flip over a line like a mirror image. Does not change size or shape.
Describe Rotation Direction, degree, and center of rotation.
Describe Translation Direction and distance
Describe Reflection Line of reflection
Center of rotation A point that a figure rotates around
Clockwise rotating right
Counterclockwise rotating left
Line of reflection a line that a figure reflects over
Image The result of a shape after a transformation
Rigid Transformation Rotation, Reflection, and Translation. Does not change side length measurements or angle measurements.
Corresponding point A location on the original figure and its image that they have in common.
Sequence of Transformations More than one transformation happening
Reflection over x-axis x-coordinate stays the same, the y-coordinate changes to its opposite. (x, y) -> (x, -y)
Reflection over y-axis y-coordinate stays the same, the x-coordinate changes to its opposite. (x, y) -> (-x, y)
Vertical Angles Angles that are equal and can perform a 180 degree rotation around the shared vertex of the angles.
Alternate Interior Angles In between parallel lines, on opposite sides of the transversal, and NOT supplementary
Transversal A line that passes through two other lines to create angle relationships
Supplementary Angles Angles where the sum of the angles equal 180 degrees
Created by: jgibler
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