Step * of Lemma eu-congruence-identity3

[e:EuclideanPlane]. ∀[a,b,c,d:Point].  (a b ∈ Point) supposing (cd=ab and (c d ∈ Point))
BY
(InstLemma `eu-congruence-identity2` [] THEN RepeatFor (ParallelLast')) }

1
.....antecedent..... 
1. EuclideanPlane
2. Point
3. Point
4. Point
5. Point
6. d ∈ Point
7. cd=ab
⊢ ab=cd


Latex:


Latex:
\mforall{}[e:EuclideanPlane].  \mforall{}[a,b,c,d:Point].    (a  =  b)  supposing  (cd=ab  and  (c  =  d))


By


Latex:
(InstLemma  `eu-congruence-identity2`  []  THEN  RepeatFor  7  (ParallelLast'))




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