Benedetti, Giovanni Battista de, Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]

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5240IO. BAPT. BENED. g. æqualis erit .g.d. tum productum .a.g. in .g.d. ſit .a.i. et .t.i. æqualis .a.i. et .l.i. pariter
ſecetur
æqualis .t.i. quæ omnia ex diametro .q.d. cogitari poſſunt:
erit igitur .u.i. æ-
qualis
.i.d. ſupereritque; quadratum .q.u. differentiæ .a.h. cognitum, hoc verò cogi-
temus
diuiſum eſſe in .4. partes æquales medijs diametris .p.r. et .n.e.
quare vnaquæque;
partium
cognoſcetur, & quadratum erit ipſius .a.K. aut ipſius .K.h. dimidij .a.h.
Quòd
ſi
aliquod iſtorum quadratorum detrahere voluerimus, nempe .n.r. ex dimidio ſum
.b. duorum quadratorum .q.i. et .i.d. cognitæ, hac via procedemus, primum con
ſiderabimus
.t.r. coniunctam .t.i. quæ quantitates erunt ſumma dimidij duorum qua-
dratorum
.q.i. et .i.d. quando quidem .t.r.
dimidium eſt quadrati .t.l. et .t.i. dimidium
71[Figure 71] gnomonis .t.i.l. coniunctum dimidio
quadrati
.i.d. ex quo .i.t.r. dimidium erit .
b
.
ex qua quantitate .i.t.r. cogitare debe
mus
detrahi quadratum ipſius .K.h. nem
pe
.n.r:
quare quod ſupereſt cognitum
erit
nempe .y.s. cum .n.i. ſed .y.m. æqualis
eſt
.n.i. et .y.m. cum .y.s. conſtituunt qua-
dratum
.p.m.
Itaque; .p.m. quadratum &
conſequenter
.p.s. eius radix cognoſce-
tur
, ita etiam & productum huius .p.s. in .
s
.x.
æqualis .c. nempe .p.x: eſtque; produ-
ctum
huiuſmodi ſemper minus quantita
te
.r.t.i: per .u.i. æquale quadrato minori .
i
.d
.
quare .i.d. cognoſcetur, conſequen-
ter
.i. @q. tanquam reſiduum ex .b. & eo-
rum
radices quadratæ cognoſcentur .a.
g
.
et .g.d.

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