Step * of Lemma Dcong-iff-cong

g:EuclideanPlane. ∀a,b,c,d:Point.  (Dcong(g;a;b;c;d) ⇐⇒ ab ≅ cd)
BY
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1
1. EuclideanPlane
2. Point
3. Point
4. Point
5. Point
6. Dcong(g;a;b;c;d)
⊢ ab ≅ cd

2
1. EuclideanPlane
2. Point
3. Point
4. Point
5. Point
6. ab ≅ cd
⊢ Dcong(g;a;b;c;d)


Latex:


Latex:
\mforall{}g:EuclideanPlane.  \mforall{}a,b,c,d:Point.    (Dcong(g;a;b;c;d)  \mLeftarrow{}{}\mRightarrow{}  ab  \mcong{}  cd)


By


Latex:
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