Directed legnths
Directed lengths are line segments that have a distance and a direction. Note that this is different from directed angles, which are angles taken modulo $180\degree$ (Error compiling LaTeX. Unknown error_msg).
Directed lengths are line segments that have a distance and a direction. Note that this is different from directed angles, which are angles taken modulo $180\degree$ (Error compiling LaTeX. Unknown error_msg).
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