The elements of geometrie of the most auncient philosopher Euclide of Megara. Faithfully (now first) translated into the Englishe toung, by H. Billingsley, citizen of London. Whereunto are annexed certaine scholies, annotations, and inuentions, of the best mathematiciens, both of time past, and in this our age. With a very fruitfull præface made by M. I. Dee, specifying the chiefe mathematicall scie[n]ces, what they are, and wherunto commodious: where, also, are disclosed certaine new secrets mathematicall and mechanicall, vntill these our daies, greatly missed

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Title
The elements of geometrie of the most auncient philosopher Euclide of Megara. Faithfully (now first) translated into the Englishe toung, by H. Billingsley, citizen of London. Whereunto are annexed certaine scholies, annotations, and inuentions, of the best mathematiciens, both of time past, and in this our age. With a very fruitfull præface made by M. I. Dee, specifying the chiefe mathematicall scie[n]ces, what they are, and wherunto commodious: where, also, are disclosed certaine new secrets mathematicall and mechanicall, vntill these our daies, greatly missed
Author
Euclid.
Publication
Imprinted at London :: By Iohn Daye,
[1570 (3 Feb.]]
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Subject terms
Geometry -- Early works to 1800.
Link to this Item
http://name.umdl.umich.edu/A00429.0001.001
Cite this Item
"The elements of geometrie of the most auncient philosopher Euclide of Megara. Faithfully (now first) translated into the Englishe toung, by H. Billingsley, citizen of London. Whereunto are annexed certaine scholies, annotations, and inuentions, of the best mathematiciens, both of time past, and in this our age. With a very fruitfull præface made by M. I. Dee, specifying the chiefe mathematicall scie[n]ces, what they are, and wherunto commodious: where, also, are disclosed certaine new secrets mathematicall and mechanicall, vntill these our daies, greatly missed." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A00429.0001.001. University of Michigan Library Digital Collections. Accessed June 15, 2024.

Pages

¶ An Assumpt.

Two vnequall right lines being geuen, to fide out how much the greater is in power more then the lesse.

Suppos that the two vnequall right lines geuen, be AB and C, of which let AB be the

Page [unnumbered]

greater. It is required to finde out how much more in power the line AB is then the line C. Describe vpon the line AB a semicircle ADB.* 1.1 And vnto it from the point A apply (by the first of the fourth) a right line AD, equall vnto the line

[illustration]
C, and draw a right line from D to B.* 1.2 Now it is mani∣fest that the angle ADB is a right angle (by the 31. of the third): and that the line AB is in power more then the line AD, that is, then the line C, by the line DB, by the 47. of the first.

* 1.3And like in sorte, two right lines being geuen, by this meanes may be founde out a right lyne which contayneth them both in power. Suppose that the two right lines geuen be AD and DB. It is required to inde out a right lyne that contayneth them both in power. Let the lines AB and DB be so put, that they compre∣hend a right angle ADB, and draw a right line from A to B. Now agayne it is manifest (by the 47. of the irst) that the line AB contayneth in power the lines AD and DB.

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