Full text: Oeuvres mathématiques diverses (Tome 1)

OBSERVATIONS SUR DIOPHANTE. 
391 
Hinc etiam elicietur ziodus inveniendi tria. triangula. rectangula nu- 
mero, quorum aree constituant triangulum rectangulum. 
Eo enim deducetur quzstio ut inveniatur triangulum cujus basis et 
hypotenusa sint quadruplz perpendiculi. Hoc autem est facile et erit 
triangulum simile huic : 
17, 15, .8. 
Tria vero triangula sie formabuntur : 
primum ^ abs 49 ei 5, 
secundum abs 47 et 3, 
tertium abs Z8 et r, 
Hine etiam elicietur modus tneeniendi tria triangula quorum arece sinl 
in ratione trium quadratorum datorum, quorum duo sint quadruplt reliqui, 
ac proinde poterunt eàdem vià zneenirt tria triangula. ejusdem. arece (*3; 
imo et infinitis modis possumus cozstruere duo triangula rectangula tn 
data ratione, ducendo unum ex terminis aut utrumque in quadrata 
data, etc. 
XNX (p. »51). 
(Ad question. XXV Libr. V.) 
Invenire tres quadratos, ul solidus sub 
ipsis contentus, quolibet ipsorum detraeto, 
faeiat quadratum. Ponatur solidus sub ipsis 
contentus 1Q, et rursus quadrati qui qua- 
runtur, sumantur ex triangulis rectangulis, 
unus a 12, alter a 325, tertius a 355 ; statuo 
eos in quadratis, et manet 1Q, quolibet ip- 
sorum detracto, faeiens quadratum. Super- 
est ut solidus sub tribus contentus sque- 
tur 1Q : est autem solidus ille ;231553 CC ; 
hoc ergo :equatur 1 Q, et omnia per 1 Q divi- 
dantur, fiunt 423529 QQ aequalia r. Est au- 
tem unitas quadratus, latus habens quadra- 
tum. Ergo oportebat etiam 31225953 QQ esse 
M E etr t 
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(1) oir Observation XXIII. 
FEnMaAT. — I.
	        
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