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# Title: Optica Promota, Seu Abdita radiorum reflexorum & refractorum Mysteria, Geometrice Enucleata (shelfmark Leibn. Marg. 94)
# Folio 123, page id 727094130:0135
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=727094130&page=135
# Source image: https://digitale-sammlungen.gwlb.de/content/727094130/jpgs/default/00000135.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 38 lines, status machine
# Lines: 38 recognised, mean confidence 0.88
# 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.

123
elocis planeca cenericis coonico; inveniatur latus C N, de anou
luS HCS. DUCANEUT reCtR F C, F HI; _ quoniam NS L NF --C
S CF5 CrIECS - SN = NF- CF-LN: eAt enII FC =-FL.
e in criangulo FL. C ilosceli, dantur omnes anguli, nempe L FC
ex medio moru inter observationes planeta C, N, dc anguli FL. C.
FC L propeer eorum aequalicarem; ergo dacur angulus CLNI. De-
inde in crionsuloC LN, Cdatis CLN, NC, NE, reperituT L CNY;
datur ideo angulus FC. N FCL L LCN; et in criangulOFCN.
e daris omnibus angulis, cumr lacere C N, dacur latuS C F: 8 C L
= CS = PC. Denigue in crianouloFCS, C daris FC, CF, eC an-
sulo FCS, ex angulis inventis FCN, NCS cognito; inveniuneur
FS. diltancia Focorum, _ FSC policio aphelir, ab observacione C.
Scholium.
medionon luppolico: derur cercia oblerracio D, e proinde co-
dem modo invenietur DN, quo in propositione invenitmr C N.
Sit axis DOTH; _ ideo dabunEuE FC = + H - C5, X FN- = 2γ
 NS; in guodcilatero isicur FCSH, daneur omnia latera, una
cum diameerO C N, C.
quibus inveniarur dia-
MCTCPFS. In quadri-
latero quoqse PISHI.
dancur omniâ lacera
SD, SNexoblerraci
OnC, FD= TH 
I NI = C H  NVS unL
cum diameero D. N, C
Quibus. rurtus inquira-
CuF FS: dacurigitur X.
quario incer PS primo
InVenCaM, _C FS Se-
cundo invencam, cujus resolucio manisectar OmnIa GuXSICa.
Mechodus aucem omnium pulcherrima, est illa quam cradie
D. ardus ast. Geometricae, Pac: 50, quae nec supponiemorum me-
sium, nec solem esseellipleos focum, sedcantum, Polis cenerum.
immobile, et planecus moveri, in lineis ellixricis; Undecen.
Esroat
St aule quis desiderer hujus Problemaris  e mocu