ASTRONOMICVM. 6Ill autem plana ordinata circulo inſcribenda, per quorum latera ſeptem primarij fi-nus initio inueſtigantur, ſunt hæc ſeptem:J. Hexagonon. 2. Tetragonon. 3. Trigonon. 4. Decagonon. 5. Penta-gonon. 6. Pentadecagonon. 7. Dodecagonon. quorum ordinatorum ratio laterumad Radium circumſcripti illis circuli talis eſt ac ſequitur in hiſcè Enunciatis.. Fadius Circuli aquatur lateri inſcripti Hexagoni.2. Quadratum lateris inſcripti Tetragoni eſt duplum:3. Trigoni verò triplum, ad Quadratum Radi.4. Quadratum Radi& quadtatum ſemiradi ſimulſumpta, æquantur quadratoRectæ compoſitæ b ſmiradio& latere inſcripti Pecagoni.5. Quadratuim Radi& quadratum dicti lateris inſcripti Decagoni ſimul ſumpta,equantur quadrato lateris inſcripti Pentagoni.6. Recta ſubtenſa inter inſcripti ad idem punctum Trigoni& Pentagoni baſes dictopuncto oppoſitas, ef latus inſcripti pentadecagoni.7. Recta ſubrenſa inter parallelas inſcripti Trigoni& Hexagoni baſes, eſt latus in-ſcripti Dodecagoni. aOmnia hac ex Geometricæ certitudinis fundamento, prout ab ipſo Euclide in Elemen-ti Geometric ſolidb ac euidenter Pemonſtrata ſunt.Iamigituur Radius circuli omnibus dictis planis ordinatis circumſcripti aſſumatur prolubitu quam plurimarum partium, vt Millies Millenarum Mille, i, ooo, ooo, ooo.

Fog ſic poſito, erit latus eidem circulo inſcripti in ſemicirculo. Subtenſæ.Hexagoni 1X.—— V, ooo, ooo, ooo.Tetragoni XC.——— 544, 2535, bs.Trigoni. CXX.——— 52, oo, gos.Decagoni 22 60 5 0 XXXVI. 2 678, 053, 96.Pentagoni. LXXII..— 5%, o, po.Pentadecagoni XXIIII. 415, 29,302.Dodecagoni. 5 XXX.— Jig, O, ogo.4 Ergo in quadrante. Semiſſes ſeu ſinus.XXX. vo, ooo, ooo.1 goꝶ, job, 50.

Arcus LX.— S660, oe, go.

Gra- XVIII.— 6300, ois, 99.

duum XXX VI.— 59% 585, 2 fz.VVV

— 256, Sig. om.

XV.