In geometry, a reflection is a type of transformation in which a shape or geometric figure is mirrored across a line or plane. It is also referred to as a flip. A reflection is a rigid transformation, which means that the size and shape of the figure do not change; the figures are congruent before and after the transformation. Below are several examples. (Look at the picture)
The term "preimage" is used to describe a geometric figure before it has been transformed and the term "image" is used to describe it after it has been transformed.
In a reflection of a 2D object, each point on the preimage moves the same distance across a line, called the line of reflection, to form a mirror image of itself. For a 3D object, each point moves the same distance across a plane of refection.
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Answer:
In geometry, a reflection is a type of transformation in which a shape or geometric figure is mirrored across a line or plane. It is also referred to as a flip. A reflection is a rigid transformation, which means that the size and shape of the figure do not change; the figures are congruent before and after the transformation. Below are several examples. (Look at the picture)
The term "preimage" is used to describe a geometric figure before it has been transformed and the term "image" is used to describe it after it has been transformed.
In a reflection of a 2D object, each point on the preimage moves the same distance across a line, called the line of reflection, to form a mirror image of itself. For a 3D object, each point moves the same distance across a plane of refection.
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