Reflections are congruence transformations where the figure is reflected over the x-axis, y-axis, or over a line.
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René Descartes
Geometry reflection: a flip of a figure over a specific point or line Real life situation: mirror or reflecting pool.
Reflection over a point is equivalent to enlargement with the same point as the focus of enlargement and a scale factor of -1.
Euclidean geometry, non euclidean geometry. Plane geometry. Three dimensional geometry to name but a few
There are different kinds of geometry including elementary geometry, Euclidean geometry, and Elliptic Geometry.