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Foundations of Euclidean Geometry
Analytic Foundations of Euclidean Geometry
Euclidean Foundations: Coordinates, Lines, Betweenness, and Orthogonality
Euclidean Foundations for Orthogonality: The Missing Piece of Structure in Ordered Pairs
Euclidean Foundations: Simple Criterion for Orthogonality of Direction Vectors
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Great, so we want the axes {(tx,ty)}\{(tx,ty)\}{(tx,ty)} and {(−ty,tx)}\{(-ty,tx)\}{(−ty,tx)} to be orthogonal. To formalize this, it'll be easier to define orthogonal vectors/d…
By Victor Wang
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