02138nam 2200361Ia 450 99638812550331620221108093710.0(CKB)4940000000084338(EEBO)2240939744(OCoLC)9920295500971(EXLCZ)99494000000008433819910227d1627 uy |engurbn||||a|bb|A breefe treatise of sphæricall triangles[electronic resource] wherein is handled the sixteene cases of a right angled triangle, being all extracted out of one diagram, and reduced into theorems, with the totall sine in the first place, so that by addition onely, they may be effected : as also, the twelue cases of an oblique sphæricall triangle, being likewise reduced into theorems, whereby with one or two additions at the most, any of them may be resolued by helpe of this canon following made with secants, and that only by such numbers as are therein to be founde, without first making any substraction, or vsing any mentall operation ... /by Iohn Speidell ... ; whereunto is annexed a Geometricall extraction formerly published by this author, containing diuers delightfull and necessarie geometricall problemes for all surueighers and others, affected to the mathematickesLondon Printed by Edward Allde dwelling neere Christ-church1627[8], 43, [6], 126 p. illSignatures: A-F⁴ G², ²A⁴(-A1) ²B-Q⁴ ²R³.Contains special t.p.: A geometricall extraction, or, A compendious collection of the chiefe and choyse problemes ... / by Iohn Speidell. London : Printed by Edward Allde ..., 1617.Reproduction of original in the Bodleian Library.eebo-0014GeometryEarly works to 1800TrigonometryEarly works to 1800GeometryTrigonometrySpeidell Johnfl. 1600-1634.1003459EBLEBLWaOLNBOOK996388125503316A breefe treatise of sphæricall triangles2336889UNISA