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# Title: Leibniz-Handschriften zur Mathematik LH 35, 1, 12
# Folio 8r, page id 00067971:0015
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ineam specie datam describere quae transeat
per duo puncta data, jungantur puncta
dato principio, et transeuntem per punctum
datum. peridem punctum e  jungatur princi–
pium et punctum datum. Et eodem pringipro de-
scribatur linea quaevis ejisdem speciei, secans
rectam jungentem, si op. opus productam.
fiat ut intercepta inter principium et punctum interse
ctionis, ad rectam jungentem, ita linea alia
ejusdem speciei ad priorem, et homologa lineae
alter ejussem speciei, ad prhomologa prioris
et linea nova erit quaesita
idem est
si pro principio aliud punctum determinatae
positionis detur.
Lineam specie datam describere
tanguli
oir
omnia p
Tres rectae ex angulis in oppositer nt mali
normales satant se in eodem puncto evi contro
Gamats
tres rectae ex Medio laterum normaliter
eductae secant se in eodem puncto quod
est centrum circuli circumscripti, quod e
AEG sim. BdG. Ergo A AG: GE = BG: GD
Ergo A, E, seu AG. Gd = 8G. GE Ergo
A, E, Bd sunt in circulo
investigetur centram gravitatis
horum trium in Triangulo,
Areae qa superficialis ambitus
vest
qui est linearis, et angul
areae quae constat, superficiebus
ambitus qui constat ex
lineis; et extremorum qua
et et extremorum quae
constant ex punctis
Ita habemus complura puncta fixa
in triangulo eodem modo se habertia
retata secundum certam considera
tionem relata, ad tria latera (etsi
non eodem modo absolute se habeant ad
tria latera); et recta fransiens
perduo hujusmodi puncta utilis erit
ad calculos priangulares ut scilicet
incognitae
positionidit rocta ad quam referuntur
ilia figura non dega non nmphidextra
centrum magnitudinis
cum id triangulo non detur
utile erit quar centium lineare, ad
imitationem foci lincan
apte eligatur