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Step * of Lemma eu-add-length-between

∀[e:EuclideanPlane]. ∀[a,b,c:Point].  |ac| = |ab| + |bc| ∈ {p:Point| O_X_p}  supposing a_b_c
BY
{ (Auto THEN EqTypeCD THEN Auto) }

1
1. e : EuclideanPlane
2. a : Point
3. b : Point
4. c : Point
5. a_b_c
⊢ |ac| = |ab| + |bc| ∈ Point

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Latex:

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Latex:
\mforall{}[e:EuclideanPlane].  \mforall{}[a,b,c:Point].    |ac|  =  |ab|  +  |bc|  supposing  a\_b\_c


By

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Latex:
(Auto  THEN  EqTypeCD  THEN  Auto)

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