Full text: Oeuvres mathématiques diverses (Tome 1)

DISSERTATION M. P. E. A. S. 
221 
ideoque 
utrecta HN ad. KL, ita tangens ZV ad rectam HI. 
Similiter probabimus esse 
ut tangentem YT ad rectam GH, ita applicatam GO ad KL: 
item 
ut tangentem XS ad rectam FG, — ita applicatam FP ad KL; 
denique 
uttangentem ER ad rectam EF, ita esse applicatam EQ ad KL. 
T S . 
Quum igitur sit 
ut tangens ZV ad rectam HI, ita applicata HN ad KL, 
rectangulum sub extremis :equabitur rectangulo sub mediis, ideoque 
rectangulum sub NH in HI sequabitur 
rectangulo sub KL in tangentem ZN. 
Similiter 
item 
denique 
rectangulum sub OG in GH— :equabitur 
rectangulo sub KL in tangentem YT; 
rectangulum sub PF in FG s:equabitur 
rectangulo sub KL in tangentem XS 
rectangulum sub EQ in EF — :vquabitur 
rectangulo sub KL in tangentem ER. 
Quid autem pluribus in re proclivi et jam ad methodum Archime- 
deam sponte sua vergente immoramur? Per inscriptas enim et cireum- 
scriptas in segmento parabolico figuras, rectangula omnia QEF, PFG, 
OGH, NHI segmentum ipsum parabolicum EQMI designabunt. Omnes 
autem tangentes ER, XS, YT, ZV, per iteratam secundum nostrae prze- 
cepta methodi cireumseriptionem, curvam ipsam EXYZA etiam desi- 
gnabunt : ergo segmentum parabolicum EQMI sequatur rectangulo sub 
KL in curvam EXA. Datur autem in rectilineis segmentum parabolicum
	        
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