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# Title: Erhardi Weigelii Sacrae Caesar. Maiest. ut & Com. Pal. Sultzb. Consiliarii, Supr. Artium Archit. Directoris Saxo Ien. Mathemat. PP. totius Academiae Senioris, Philosophia Mathematica (shelfmarks Leibn. Marg. 65; ZEN Leibn. Marg. 65)
# Folio 255, page id 79876922X:0755
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delicleramus. An autem tale quid possibile (IL; ee
an, ec quomodo, secandus sic angulus externus
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Sanc quia vartlaliS anGMlIIS P. C. A, deDet aequa-
lis esle alteri dacorum C. A B. spectatis rectis
E. C de AD. Per Es
Tuccurxienobis (chema simile parallelismi ProD.
27. e eodtem mocto, (2 Partialis F C. D. Fuerit
aequalis alteri clacorum A B C. reCOrdlaUE
rectas easclem, E. Cy AB. propter transverta-
tem B. C D. Sic incidentem, esse parallelas per
Prop: 28. Contirmat itaque una pars alteram,
acpossibiiem, imo necessariam. sitproinde.
EEoltendatur, angulum externum ACD.
Duobus incernis _ opposicis A. et B. necessario
xguari, concipiatur ex Puneto Ci. lateri Com
muni AB. ducta parallelaC. F, secans ansrilum
externum in duas partes: de ad oculum mentis
Pacebic, alcerum partialem A C. R tanquam alter-
num aequars verricali apsulo A; de alterum par-
cialem F. C. D. tanquam oppolitum aequari an-
culopedtali B. per prop. 27. e28. Sideoque cer-
cum exie, uerumque (Parcialem simut) h. C. exter-
numcocum AC. D. aequalem esse duobus inter-
viS e OpPOstIS A. EB, sivut Cumeis, quod in
primoproplitionismembro Mmarehatur.
Cuu vericaci demonstracae, nullo nesotio
succeditmembru Propositionis alterum, nempe
a L
omnes cresinternos A. B. Ci. duobo rectis aequa-
nen
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