PHYSICAL ann LITERARY. 147 
Ga A, N, X, H; quare erit angulus HNX 
_ aequalis angulo HAX, hoc eft, angulo HFM; 
parallelaeigitur funt rectae NX, FM; et quo- 
 niam eft FN equalis ipfi NH, erit et MX ae- 
qualis ipfi XH, quare erit et EK aequalis ipfi 
Pia .@. Eb. D; 
Alias quoque propofitiones buic pettantal ex~ 
cogitavi, quarum aliquot bhuie fubjicere vifum 
eft. 
‘PROP. I. ° Tab. 1. Fig. 4. 
Sit circulus ABC, et recta AB circulo 
~ occurrens in A, B; et fit C puncdtum 
in circumferentia circuli; jungan- — 
_ tur CA, CB, fitque recta DE paral- 
- lela reétae AC, reétis AB, CB oc- 
currens in D, E; per pun@um D 
ducatur quaevis recta circulo oc- 
_currens in F,G; et CF, CG jun- 
_. gantur rectae DE occurrentes in 
oe K; erit rectangulum HEK ae- 
- gual rectangulo Ge. 
Factum 
