Step * 1 of Lemma geo-add-length-property2


1. EuclideanPlane
2. Point
3. Point
4. {p:Point| O_X_p} 
⊢ cd ≅ pp |cd|
BY
Unfold `geo-add-length` }

1
1. EuclideanPlane
2. Point
3. Point
4. {p:Point| O_X_p} 
⊢ cd ≅ pextend Op by X|cd|


Latex:


Latex:

1.  g  :  EuclideanPlane
2.  c  :  Point
3.  d  :  Point
4.  p  :  \{p:Point|  O\_X\_p\} 
\mvdash{}  cd  \mcong{}  pp  +  |cd|


By


Latex:
Unfold  `geo-add-length`  0




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