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R O P O S I

TI O X.

1

Q!_eadramm me1hodo Gallic.i comrmmi intcri'us

munire.

Proponitur qnadratum muniendum methodo

Gallica communi, cujl\$ datur larus exterius AB

160

exapedarum, confürutis angulis ABC, BAC

invenirur cemrum C, ex centro A defcribacur ar–

cus DE , rrifariam dividendus,

&

per primam di–

vilionem O ducatur linea AOF, hoc efi angulus

OAD fiat graduum

15,

linea AO diagonalem

BC fecabit in punél:o F,rransferatur BF in AG,du–

carurque BG , linez Al, BH, a:quales linr linea::

BF, ducanmrque HK, I L perpcndicn)ares ad FG

donec occurranr íl:ringenribus AF '.BG in punll:is

K

&

L , denique jungamr cortma

K

L.

ldem

pra:fia in aliis•latcribus,

&

probam delineaveris

qu3'1raram munirionem.

Dem!lnlhario. Primb , cum angulus imminu–

tus BAF

Ge

graduum ·,

5,

angulus>defcndens in–

terior AKL illi alternus erit totidem graclumn.

Secundo,cum femiangulus circumferenriz nem–

pe CAB elfet graduum 45 ,fubtrahendo angulum

imminurmn BAK, rcíl:at femiangulus IAG ¡;ra:

duum ;o,

&

confequemer rotus angulus defen–

fus IAR graduum

60.

Tercio, cum angnlus LKI lirgraduum

15,

Ala .

LL plufqnam quarram panem cortina: obtinebir.

Q.uan6, femicollum ada:quat alam circiter,

&

fucies duas tercias cortinirobrinet quz omnia fe–

cundum reg<llas procedum.

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PROPOSITIO XI.

Pmtagom¡m methodo Gallica interi1u mttnil'e.

zqualis lincz KL,ala: PF, G D perpendiculares

enmr ad lacus lK , producenrurque donec.occur–

l:am füingentibus in punél:is F

&

D, denique du·

ccrur cortina F D.

Demonftrario.Angulus defeníus reél:us eíl:,an–

gulns imminmus KlF eíl:

15

graduum

&

confe–

quemer ala paulo majur quarta parte coninre. Fa·

cies xccdir femicottinam igirur nihil admilfum

ell:

íi1

hac defcriptionc" comca regulas.

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P R O P O S

1

T

1

O

XIII.

r

0!Jdlibet pol):gomem

,

methodo Gal/icA

imeriJ,s

numire.

Proponatur quodlibet polygomtm Íupra exa:

gomuli , verbi gracia oél:ogonnm, cujus lams ex–

terius

fit

AB, fianr anguh ABC, BAC, quilibet

grad. 6.7-;- habebiturquc cencrum

C.

Fianc femi–

anguli defcnfi CAI, CBH femireél:i, producan–

turque linez Al, BH in F,

&

G, arque ita angLt–

lus defonfos erir graduum

90.

Dividarur lams AB

1

in 7 parres :rqoales, tribuanmrquc duz faciebus'

Al , BH, ducanrur alz IO, HS, perpendiculares

":Id AB ,

&

requ"1es uni íeprimz l"ani linez AB,

jungaunque cortina OS, idem fiar in

linguli~

la-

S!iperiorem praxin in penragono uforpare pof-

teribns,

&

perfeél:a erit defcriptio, quam ofien-

fu1~us,

confütuto angulo immmuro

1

5

graduum, , do probam c!fe.

&

alfomere pro facie li11eam •••. cztera funr om-

Demonfirario. Angulus defenfus reél:us eft,

al~

nino limilia.

2.

3exapcdas obrinet , femicolluin fer

e

requale.

S1

. I?emonlhario.Cum femiangulus circnmferen-

verb in aliquibus polygonis effet minus quam _P'lr

ria:

In

pemagono

fit

graduum

5

4, li fubrrahas

lit,

poll¿r augcri imminuca ala\proportio

co~r1~a:

11:radus

1

í, re!!:anr gradus

¡

9,

erirque an<>ulus de-

ad faciem eíl:

fere

ur

¡

ad

2.;

ergo hzc defcnpno

fenfus graduum 78. Facies major erit te'micorti-

(ecundum regulas procedi1.

na. Ala

&

femicolla circiter quarcam cortina:

partem habenr.

,

lll.!lll.

!l.ll: ll.ll

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<tMo·m·a<f>Hf.3·i*l--«ll'!@a-~OM

PROPOSITI0

1

XIV.

PROPO SITIO XII.

1

E:ragormm methodo Gallica interiu1 m 1mire.

Fallo fupra

lar~s

Kl"triangulo zqnilateroCIK,

0!_adratu;,, merhodo

q~llica.

mimire

'

tpe

Ang11li

dmgenm.

Ut compendioliores pr_axes evadant

~onnulli

angulum dirigentem adh1bent , quem ita

e:~:;