Affine geometry is a branch of geometry that studies the properties of figures that remain invariant under affine transformations. These transformations include operations such as translation, scaling, rotation, and shearing, which can alter the size and orientation of shapes but do not change their basic structure or ratios of distances. Here are some key concepts in affine geometry: 1. **Affine Transformations**: An affine transformation is a function between affine spaces that preserves points, straight lines, and planes.
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