vidatiir arcus Pr in tot partes squaies quot 

 flint unitates in n, quarum ilia qus piin8:o P 

 adjacet, fit PA. FaQ:o initio in piinGo A dividatur 

 integra circumferentia in tot partes xqualcs AB, BC, 

 CD, DE , &c quot funt unitates in n, & erunt PA,PB, 



PC,PD.PE,&c. -4, ^.,^JP. 



n n K n n 



&c refbeftive. Quare a fingulis punftis divifionum 

 A,B, C, D, E, &c demiffis ad diametrum normalibus 

 Aa, Bb, Cc, Dd,Ee,&c. erunt Oa, Ob, Oc, Od, Oe, 

 &c. valores ipiius , pofitivi quidem fi a centro 

 O tendant verfus P , negativi fi verlus p. Unde quan- 

 titas ad refolvendum propofita i — ^z*'-|-2;*"~ 



I — 2 0a.2;-f-2;^ X i — 20h.z-\-z' X i-f-^Oc.z-j"-^* 



X i-f-^Od.z-j-z' X I — aOe.z-f-s^ &c. Porrofiin 

 radio OP produQ:o fi opus , fiimatur Os zi z , & jun- 

 gantur SA, SB, SC,SD,SE, &c. erunt SAqizi— 2 

 Oa.2;-f.z- , SBq = i — 20b.2;+2;» ,SCq = i+20c. 

 z+z' , SDq =Zi-f-20d.2;+2i%SEq=ll— 20e. 

 2 + 2;*, &c. unde i — 02;« -f- 2; S AqX 

 SBqX SCq X S^Dq X SE q &c. Et hxc con- 

 ftructio , pofita q — ± a & fiimendo quadi atorum 

 'latera abit in tneorema Cothefii. 



Probh 2. 



Uantttatem ; in fra^liones bujus for- 



1—^2;« +2*" *^ 



g — ^ z 



w<f, — quatenus fieri potefl^ refolvere, 

 uH f habet valores ProbL J inventos, 



Cafus 



