Editing Projective Geometry (section)

== <span style="color: #FFFFFF;">Remembering</span> ==
* '''Projective Geometry''' — The study of properties invariant under projection.
* '''Central Projection''' — Mapping points to a surface through a single "Eye" point.
* '''Point at Infinity''' — The place where parallel lines appear to meet on the horizon.
* '''Line at Infinity''' — The "Horizon" itself in a 2D projection.
* '''Projective Plane''' — A plane extended to include all points at infinity.
* '''Cross-Ratio''' — A specific mathematical ratio that never changes, even if you stretch or tilt a shape.
* '''Duality''' — The surprising principle that every theorem about "Points and Lines" is also true if you swap the words "Point" and "Line."
* '''Homogeneous Coordinates''' — A 4D coordinate system used to represent 3D projective space.
* '''Perspective''' — The art and science of representing 3D depth on a 2D surface.
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