ftf DE RESOLVTIONE 



Fro hoc Problc;natc niluendo adhibcatur iftg 

 transforniatia aeqiuitianis nollrac primac : 



dd—iif-hacoi.B-^fcoi.Ci-^^aCin B-tffin.C)' 



■vnde colliyitur 



fc+^cof.lS+^coLCrVf^-aun.B+t-GaOy+tfrin.B-cfin.C), 



hinc ob ambiguitatcm figni radicalis , duplex pro k 



prodibit \alor , \triusque aurcm ratio IcquLBti modo 



Tab. I. cxplicafur : P^r pundum B rcdne BC ducuniur li- 



'■■ ^' i)CAc B A — c, B F — r, quae cum B C taciunt aa- 



gul>'S L' B A, C B F reCpediue aequaks aogulis da- 



tis B et C, pcr punclium autcm F agi,tur linea 



reda E F D parallela ipfi B C , quo f.vflo liquet 



j:nn(flum D quadrilatcri ir.ncniri dum ccntro A ra- 



dio A D — <^ dcfciibatur ciixuUis rcdam EF inter- 



f€ca.ns iii putldiO D; nam fi pcr D ducaiur D C pa- 



rallela ipfi B F, p.ueb:t in quadiilatcro ABCD 



angulos cxternos C' B A, G C D rclpeduie acquale» 



•ellc daris B, C , tumque ciTe latus A B :::^ <7 , 



C D rn '\ F =: r . A D rr ^. At circulns ccntro A 



radio zn /i' dcfcriptus reirtam EF in binis pundis 



int.rtfcare potefi , ilt y^iiuv ahcra intcrfcclio b' et 

 dudi.t, D' C parallcla ipfi B F aliud conlcqucmur 



quadrnatciura , quod t.imen pro noUra fii^ura pro- 



prie loquendo ad noftram quacftionem non pcrtiuet, 

 ^nzm m illo quadrihtcro anguli intcrui A B C , 



13 C 'i' re-iicdliue acquivntur angulis datis B, C. 



Caetcrum fi cx A in E F normalis ducatur , A H, 



facile demonftratur eiTc : 



A E — f fiu. C — a fin. B ideoque 



ED-- 



