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Step * of Lemma stable__right-angle

∀e:BasicGeometry. ∀a,b,c:Point.  Stable{Rabc}
BY
{ (Unfold `right-angle` 0 THEN Auto) }

1
1. e : BasicGeometry
2. a : Point
3. b : Point
4. c : Point
⊢ Stable{∀c':Point. (c'=b=c ⇒ ac ≅ ac')}

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Latex:

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Latex:
\mforall{}e:BasicGeometry.  \mforall{}a,b,c:Point.    Stable\{Rabc\}


By

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Latex:
(Unfold  `right-angle`  0  THEN  Auto)

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