Step * 1 of Lemma geo-ab-eq-x


1. BasicGeometry
2. Point
3. Point
4. a ≡ b
⊢ |ab| ∈ Length
BY
Assert ⌜|aa| |ab| ∈ Length⌝⋅ }

1
.....assertion..... 
1. BasicGeometry
2. Point
3. Point
4. a ≡ b
⊢ |aa| |ab| ∈ Length

2
1. BasicGeometry
2. Point
3. Point
4. a ≡ b
5. |aa| |ab| ∈ Length
⊢ |ab| ∈ Length


Latex:


Latex:

1.  e  :  BasicGeometry
2.  a  :  Point
3.  b  :  Point
4.  a  \mequiv{}  b
\mvdash{}  X  =  |ab|


By


Latex:
Assert  \mkleeneopen{}|aa|  =  |ab|\mkleeneclose{}\mcdot{}




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