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23 Cards in this Set
- Front
- Back
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Congruent segments |
Line segments whose lengths are equal |
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Degree of Rotation |
Number of degrees a figure is rotated about the point of rotation |
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Horizontal Reflection Symmetry |
Reflection symmetry about a horizontal line of reflection |
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Midpoint of a line segment |
The point halfway between the endpoint of a line segment |
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Composition of transformation |
Combination of two or more transformation |
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Dilation |
A similarity transformation in which a figure is enlarge or reduced using a scale factor and a center of dilation |
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Euclidean geometry |
The study of plane and solid geometry based on definitions, undefined terms and the assumption of mathematician Euclid |
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Image |
Figure after a transformation |
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Line of symmetry |
Line dividing and image into two congruent parts that are mirror images of each other |
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Reflection |
Rigid transformation in which each point in a geometric figure is at an equal distance on the opposite side of a given line |
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Reflection symmetry |
Symmetry in which one half of the image is a mirror image of the other over a line of reflection |
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Non-Rigid Transformation |
A transformation that preserves similarity and reductions and enlargements that do not persevere similarity |
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Parallel lines |
Lines in the same plane that never intersect.Slopes of parallel lines are equal My2=My1 |
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Perpendicular Lines |
Lines in the same plane that intersect at a 90° angles whose slopes are opposite reciprocals |
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Point roataion |
Point around which a figure is rotated |
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Point symmetry |
180° rotaion around a point |
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Pre-Image |
Original figure prior to a transformation |
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Rigid transformation |
A transformation that preserves the size and shape of a figure |
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Rotation |
A rigid transformation where each point on the figure is rotated about a given point |
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Rotational Symmetry |
Symmetry that occurs if a figure can be rotated less than 360° around a central point and still look the same as the original. The numbers of times a figure fits into itself in one complete rotation is called the order of rotational symmetry |
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Translation |
Rigid transformation moving all points in a geometric figure the same distance and the same direction |
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Two-Dimensional cordinate system |
Two axes at right angles to each other, forming a xy-plane, consisting of points |
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Vertical Reflection symmetry |
Reflection symmetry about a vertical line of reflection |
