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Rigid Transformation
8th grade Unit 1 vocab
Term | Definition |
---|---|
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 |