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The mapping, or movement, of all points of a figure in a plane according to a common operation, such as translation, reflection, or rotation.
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A line that acts as a mirror so that corresponding points are the same distance from the mirror.
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A part of a line between two points on the line.
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The set of all points equidistant from a point in a plane.
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Sides that have the same relative position in geometric figures.
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Having the same size, shape, and measure.
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A transformation of a figure that creates a mirror image, "flips", over a line.
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One of the undefined terms of geometry that represents thickness an infinite set of points with no thickness and its length continues in two opposite directions indefinitely.
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The amount of rotation (in degrees) of a figure about a fixed point such as the origin.
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A transformation that slides each point of a figure the same distance in the same direction.
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The point at which two or more lines interested or cross.
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A point, line or line segment that divides a segment or angle into two equal parts.
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A figure created by two distinct rays that share a common endpoint.
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A figure before a transformation has taken place.
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