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Step * of Lemma eu-bisect-angle_wf

∀e:EuclideanPlane. ∀a,b,c:Point.  (eu-bisect-angle(e;a;b;c) ∈ ℙ)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}e:EuclideanPlane.  \mforall{}a,b,c:Point.    (eu-bisect-angle(e;a;b;c)  \mmember{}  \mBbbP{})


By

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Latex:
ProveWfLemma

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