Geometry Terms
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Last updated 9:07 PM on 9/23/22
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11 Terms
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Angle of Rotation
a measurement of the amount, the angle, by which a figure is rotated counterclockwise about a fixed point, often the center of a circle
2
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Center of Rotation
a fixed point around which shapes move in a circular motion to a new position
3
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Center of Dilation
the fixed point about which the figure is enlarged or reduced
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Center of Symmetry
the center of rotation in a figure that has rotational symmetry
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Composition of transformations
a combination of two or more transformations
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Congruence transformations (rigid motions)
if you slide, flip, or turn a triangle, the size and shape do not change
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Dilation
a transformation that changes the size of an object, but not the shape.
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Glide reflection
the composition of a translation and a reflection across a line parallel to the translation vector
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Image
the new position of a point, a line, a line segment, or a figure after a transformation
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Pre-image
the original figure in a transformation
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Line of Reflection
a line that a figure is flipped across to create a mirror image of the original figure
