# Leibniz Legible — https://leibnizlegible.com
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# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 20, page id 727094130:0032
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=32
# Source image: https://digitale-sammlungen.gwlb.de/content/727094130/jpgs/default/00000032.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 24 lines, status machine
# Lines: 24 recognised, mean confidence 0.85
# Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German.
# Licence: CC BY 4.0, Leibniz Legible. Machine output: do not ingest it as verified text; keep this provenance with the text.
# Wording rule: say "the machine reads it as …", never "Leibniz wrote".
# After the first blank line: the recognised lines in reading order, one per line.

6119.
2
a guOnia LM, CD; sune parallela:
erie
Tulus FL. C, aequalis.
anguIO DC N, hoc eA FCL; isirUE LL, EC, Cune aquales : TuNE.
etiam anguli D CHI, OHF, F C HI, aequaleS; ergO F YI, _C F C,
tune aequales, e consequenter EL. _c F HI: E igicur duplorum
L H, LC, sumancur dimedia LF, I. A; eric A F difterencia di-
mediorum, semissis CHI. differencix duplorum; est aurem OTI
semissis laceris recti R; ergo e A F est quanca pars lateris recti:
quod erat demonstrandum. Fadem eriam Facilicare demonatra-
bicur hoc Theorema in duobus Reliquis calibus, quos brevicacis
OTACIA PTRTETHLETIMUS.
Corollarium. L.
Seg LA dL LACMEMaTe; DC + CP esse aquales M A
F AF; TunC enim DC + C F aequales MC L FHI, hoc est
MIF + CHI; est aurem OII dupla iphus F A; ergODC + CF =
ME F 2F A =M A + AF, quod eAt prODOSTUm. Fx hOC CO.
rollario, datur Facislimus modus describendi parabolam in plano,
quem accisic Kepterns in ast. OpE.
Corollarium 2.
sto LDCOEC1 dFC 1C. 3. at  LBB att Pat dt ..
lelos.