Easily Dealing with Any-Dimensional Planes
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In 2D, 2 intersecting hyperplanes (=lines here) will define a point.
But what if these lines are parallel? Well you just got the "point at infinity" abstraction for free. And if you defined operators on points as intersections of lines they will also work with the points at infinity.
All this being nicely described under Projective Geometric Algebra: https://projectivegeometricalgebra.org/projgeomalg.pdf
Also: with a few modifications you get conformal geometry as well; with everything being defined as intersections of spheres. After all, what is a plane but a sphere that has its center at infinity?