Philippi Lansbergii Cyclometriae novae libri dvo .. (1616)
Lansberge, Philippe van, 1561-1632 · Middelbvrgi : Ex officina Richardi Schilders · leaf 13
cuius radius in certa menfura datus eft,puta 10,100, 1000, 10000, 100000, 1000000, 10000000, vel quacunque alia. ! Vltimum arcum Quadrantis dico, qui peripherie Quadranis, velfemel, vel quoties libet, bife&ze, eft ultimus. Denique rectam ultimo Quadrantis arcui aequalem dico, non qua talis cft in… … lem ultimo quadrantis arcui D C. Demonftratio perfpicua erit fi íemiradius A E bifeceturin H, & D C femiquadrans in 1, & ex puncto H per punctum I ducatur re- &a HIK intangentem D G. Hzcenim quia tangentem D F ab. Íciffam bifecabit in K; erit D F ad D K , vt peripheria D C ad peri- pheriam dimidiam…
Circle · Geometry -- Early works to 1800
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
