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Step * 2 1 1 1 1 1 of Lemma eu-add-length-between-iff

.....assertion..... 
1. e : EuclideanPlane
2. a : Point
3. b : Point
4. |aa| = |ab| + |ba| ∈ {p:Point| O_X_p} 
⊢ |ab| ≤ |ab| + |ba|
BY
{ Auto }

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Latex:

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Latex:
.....assertion..... 
1.  e  :  EuclideanPlane
2.  a  :  Point
3.  b  :  Point
4.  |aa|  =  |ab|  +  |ba|
\mvdash{}  |ab|  \mleq{}  |ab|  +  |ba|


By

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Latex:
Auto

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