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Step * of Lemma eu-congruent-flip-seg

∀e:EuclideanPlane. ∀[a,b:Point].  ab ≡ ba
BY
{ (Auto THEN RepUR ``eu-seg-congruent`` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}e:EuclideanPlane.  \mforall{}[a,b:Point].    ab  \mequiv{}  ba


By

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Latex:
(Auto  THEN  RepUR  ``eu-seg-congruent``  0  THEN  Auto)

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