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TRABC
TRDEF
EEABDE
EEACDF
EEBCEF
EQEE    cn:equalityreflexive
EQFF   cn:equalityreflexive
EQBB    cn:equalityreflexive
EQCC    cn:equalityreflexive
EQDD    cn:equalityreflexive
EQAA    cn:equalityreflexive
NCABC  defn:triangle
NCDEF  defn:triangle
EQAB assumption
 COABC defn:collinear
NEAB reductio
NEBA  lemma:inequalitysymmetric
EQBC assumption
 COABC defn:collinear
NEBC reductio
NECB  lemma:inequalitysymmetric
EQDE  assumption
 CODEF  defn:collinear
NEDE   reductio
NEED   lemma:inequalitysymmetric
EQAC  assumption
 COABC defn:collinear
NEAC reductio
NECA  lemma:inequalitysymmetric
EQDF  assumption
 CODEF defn:collinear
NEDF  reductio
NEFD  lemma:inequalitysymmetric
EQEF  assumption
 CODEF defn:collinear
NEEF  reductio
NEFE   lemma:inequalitysymmetric
RADEE   lemma:ray4
RADFF   lemma:ray4
RAABB   lemma:ray4
RAACC   lemma:ray4
COBAC   assumption
 COABC  lemma:collinearorder
NCBAC   reductio
EABACEDF   defn:equalangles
EEBCEF  
EEBAED   lemma:congruenceflip
EECAFD   lemma:congruenceflip
RAEFF   lemma:ray4
RAEDD    lemma:ray4
RABCC    lemma:ray4
RABAA    lemma:ray4
COCBA  assumption
 COABC  lemma:collinearorder
NCCBA   reductio
EACBAFED  defn:equalangles
EECAFD   lemma:congruenceflip  
EECBFE   lemma:congruenceflip
EEABDE   
RAFDD   lemma:ray4
RAFEE    lemma:ray4
RACAA    lemma:ray4
RACBB    lemma:ray4
COACB  assumption
 COABC  lemma:collinearorder
NCACB   reductio
EAACBDFE  defn:equalangles
ANEABACEDF+EACBAFED+EAACBDFE