DE 



QVADRI L ATERIS 



QVIBVS CIRCVLVM TAM INSCRIBERE QVAM 



circvmscribere; LICET.. 



Au£fore N 

 NICOLAO FVSS» 



Conuenluv exhib, die i$ Aug. 1794. 



§1. 1». 



L^i quadrilateri: circulo infcripti; omnia latera' fuerint cogni- 

 ta ,, nolunr eiti eius areanij, radium circuli circumfcripticr, an- 

 galos ■, diagonal: s „ etc. ,, fatis concinne per ipfa latera. ex- 

 primi. pofle.. Sin autem de quadrilateris agitur circulO cir- 

 cumfcriptis 5 tum latera^ lbla- non fufficiunt ad determinan- 

 dam aream , radium circuli Infcripti v diagonales 5 angtilos ,, 

 ptm&a contactus „ etc.;, fed; praeter latera poitremoruirs ele- 

 mentorum vnum infuper cognitum effe debet vt reliqua de- 

 finirf queant,. Hanc inueffigationem- nuper fuscipiens cum 

 in varias incidiflem; expremones: admodtirrr flmpiices et com- 

 modas ,, eas heic. exhibere eo minus dubito , quod anfam 

 praebnerint nonnullas proprietates nouas et iingulares eo- 

 rum quadiilaterorumt demonftrandt, quibus circultim tam in- 

 fcribere quam> circumfcribere licet. Quo autem omnia in 

 promttv flnt quibus in noftra hac disquifitione indigemus , 



con- 



