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Step * of Lemma geo-perp-in-symmetry2

∀e:BasicGeometry. ∀x:Point.  ∀[a,b,c,d:Point].  (ab  ⊥x cd ⇒ ba  ⊥x cd)
BY
{ (Auto THEN ParallelLast THEN Auto) }

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Latex:

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Latex:
\mforall{}e:BasicGeometry.  \mforall{}x:Point.    \mforall{}[a,b,c,d:Point].    (ab    \mbot{}x  cd  {}\mRightarrow{}  ba    \mbot{}x  cd)


By

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Latex:
(Auto  THEN  ParallelLast  THEN  Auto)

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