Sindbad~EG File Manager

RRABC
RRCBA   lemma:8.2
ANBECBD+EECBDB+EECADA+NEBA  defn:rightangle
BECBD
EECBDB
EECADA
NEBA
NCABC   lemma:rightangleNC
TRABC   defn:triangle
COACB  assumption
 COABC  lemma:collinearorder
NCACB  reductio
TRACB   defn:triangle
ANAOCABABD+AOBCAABD  proposition:16
AOCABABD
EQAA   cn:equalityreflexive
EQCC   cn:equalityreflexive
EQDD   cn:equalityreflexive
EQBC assumption
 COABC  defn:collinear
NEBC reductio
NEBD  lemma:betweennotequal
RABAA  lemma:ray4
RABCC  lemma:ray4
RABDD  lemma:ray4
EEBABA  cn:congruencereflexive
EEBDBC lemma:doublereverse
EEADAC  lemma:doublereverse
COABD   assumption
 COCBD  defn:collinear
 CODBC  lemma:collinearorder
 CODBA  lemma:collinearorder
 NEBD   lemma:betweennotequal
 NEDB   lemma:inequalitysymmetric
 COBCA  lemma:collinear4
 COABC  lemma:collinearorder
 NCABC
NCABD   reductio
EAABDABC  defn:equalangles
EAABCABD  lemma:equalanglessymmetric
AOBCAABD
AOBCAABC lemma:angleorderrespectscongruence
TRABC
LTABAC   proposition:19
AOCABABC lemma:angleorderrespectscongruence
COBAC   assumption
 COABC  lemma:collinearorder
 NCABC
NCBAC   reductio
EABACCAB lemma:ABCequalsCBA
AOBACABC lemma:angleorderrespectscongruence2
COCBA  assumption
 COABC lemma:collinearorder
NCCBA   reductio
TRCBA    defn:triangle
EACBAABC lemma:ABCequalsCBA
AOBACCBA lemma:angleorderrespectscongruence
LTCBCA proposition:19
EECBBC cn:equalityreverse
LTBCCA lemma:lessthancongruence2
EECAAC cn:equalityreverse
LTBCAC lemma:lessthancongruence
ANLTABAC+LTBCAC