Clavius, Christoph, Geometria practica

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208178GEOMETR. PRACT.11Ex cognita ſe-
midiametro

circuli
inue-
nire
lat{us} fi-
guræregula-
ris
in eo circu-
lo
deſcriptæ.
22Fractionem
magnam
ad
minorem
ferè
æquiualentem

reducere
.
Et ſi moleſtum videatur operari cum fractione tam magna, reduces eam ad
minorem
quaſi æquiualentem hoc modo.
Elige pro Numeratore quemuis nu-
merum
, vt 10.
Et fiat vt Numerator 164068. ad ſuum Denominatorẽ 10000000.
ita Numerator electus 10. ad aliud, reperieſque Denominatorem 609 {82588/164068}.
Ita
vt relicta hac fractione, Denominator 609.
ſit minor quam verus; & 610.
maior
, hoc eſt, fractio {10/609}.
ſit maior fractione {164068/10000000}. fractio autem
33Inter du{as}
fractiones
in-
uenire
mediã.
{10/610}.
minor Inter has autẽ duas fractiones {10/609}. {10/610}. produces mediã {20/1219}. cuius
Numerator
ex Numeratoribus, &
Denominator ex Denominatoribus confla-
tus
eſt.
Erit que fractio inuenta ferè maiori illi æqualis.
44Ex cognito
latere
figuræ
regularis
, in-
uenire
ſemi-
diam
{et}rum
circuli
cir-
cumſcripti
.

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