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# Title: Ioachimi Iungii Philos. ac Medic. D. & Gymnasii Hamburgensis Rectoris Geometria Empirica (shelfmarks Leibn. Marg. 9a; ZEN Leibn. Marg. 9a)
# Folio 31, page id 73061350X:0039
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5. Recta circulum secare dicieur, si peripheriaur ejus
secerlire li parcem lui aliquam in circuliplano habeae.
6. Circuli se mucuoransere dicuntur, siperipherix
eorum (E FAnZAnE.
7. Segmentum Circuliestplonum ABC, orcucircun
si ABC, ec recta AC comprehentum.
8. Sectorcirculi dicitur planum ABCD, arcu circuli
BCD, _ duabus Cemidiamerris AB, AD, in terminos arcus.
insiltencibus comprehentum.
9. Angulus seomenti dicitur mixtilineus anculus
qui lub cara peripheria, _ recci circulum (ccante compre
tiendirur: ur an sulusB. C, BC. A.
10. Ini seomento ABC dicitur esse ansulusrectiline.
us ABC, si vercex ejus sic in arcu scemencis crura rero ejus
percerminos ejuldem arcustranleant.
II. Rectilineus BAC ansulus rel ex centro, vel experi.
pheria inlistere dicitur, in arcum BDC, si rereicem velin
cerero, vel in peripheriahabeat; crura rero ejus PexTeF
ei
minosarcus BDC. transeane.
12. Subtensa velchorda arcus dicicur rectas cerminos
ejus connectens. Inscripea circulo dicicur recta, urrinq; d
Deripheriacerminata
13. Hlomocentricirculi (icidem, peripherix) dicuntur,
qui communehabenccenerum.
14. Recta perpendicularis peripheriu vel in peri
pheriam elle dicirur, (ee per consequens perpendiculari-
cer eam lecare, ci insistere) quae angulos, quos rel cum
conrexa relcum cariperipheria Facur, aquates Facie.
FIOc2. Angulus quem cum con vexa facit nanquam aqualis esse
pocest ansulo, quem cumear a facit.
25. Rectilinea sigura cixculo inscrixta, vel circulus
eicircum leripcus ese disirur, St omnes ejusapices lunein
circuli periphexii
6o LB CBB.