The elements of Euclid, explained and demonstrated in a new and most easie method with the uses of each proposition in all the parts of the mathematicks / by Claude Francois Milliet D'Chales, a Jesuit ; done out of French, corrected and augmented, and illustrated with nine copper plates, and the effigies of Euclid, by Reeve Williams ...

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Title
The elements of Euclid, explained and demonstrated in a new and most easie method with the uses of each proposition in all the parts of the mathematicks / by Claude Francois Milliet D'Chales, a Jesuit ; done out of French, corrected and augmented, and illustrated with nine copper plates, and the effigies of Euclid, by Reeve Williams ...
Author
Dechales, Claude-François Milliet, 1621-1678.
Publication
London :: Printed for Philip Lea ...,
1685.
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Subject terms
Geometry -- Early works to 1800.
Mathematical analysis.
Cite this Item
"The elements of Euclid, explained and demonstrated in a new and most easie method with the uses of each proposition in all the parts of the mathematicks / by Claude Francois Milliet D'Chales, a Jesuit ; done out of French, corrected and augmented, and illustrated with nine copper plates, and the effigies of Euclid, by Reeve Williams ..." In the digital collection Early English Books Online 2. https://name.umdl.umich.edu/A38722.0001.001. University of Michigan Library Digital Collections. Accessed May 1, 2024.

Pages

PROPOSITION XIII. THEOREM.

IF of two equal Reasons the one is greater than a third, the other shall be so like∣wise.

AB:CD:EF.
If there be the same reason of A to B, as of C to D, and that there is a greater rea∣son of A to B, than of E to F; I say that there shall be a greater reason of C to D, than of E to F.

Demonstration. Seeing there is a greater reason of A to B, than of E to F, A shall contain more times any aliquot part of B, than E contains a like aliquot part of F, (by the 6th. Definition.) Now C contains a like aliquot part of D, as ma∣ny times as A contains that of B, seeing there is the same reason of A to B, as of

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C to D: so then C contains an aliquot part of D, more times than E contain∣eth a like aliquot part of F; thence there is a greater reason of C to D, than of E to F.

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