Geometrical trigonometry, or, The explanation of such geometrical problems as are most useful & necessary, either for the construction of the canons of triangles, or for the solution of them together with the proportions themselves suteable unto every case both in plain and spherical triangles ... / by J. Newton ...

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Title: Geometrical trigonometry, or, The explanation of such geometrical problems as are most useful & necessary, either for the construction of the canons of triangles, or for the solution of them together with the proportions themselves suteable unto every case both in plain and spherical triangles ... / by J. Newton ...
Author: Newton, John, 1622-1678.
Publication: London :: Printed for George Hurlock ... and Thomas Pierrepont ...,; 1659.
Rights/Permissions: To the extent possible under law, the Text Creation Partnership has waived all copyright and related or neighboring rights to this keyboarded and encoded edition of the work described above, according to the terms of the CC0 1.0 Public Domain Dedication (http://creativecommons.org/publicdomain/zero/1.0/). This waiver does not extend to any page images or other supplementary files associated with this work, which may be protected by copyright or other license restrictions. Please go to http://www.textcreationpartnership.org/ for more information.
Subject terms: Trigonometry -- Early works to 1800.
Link to this Item: http://name.umdl.umich.edu/A52262.0001.001
Cite this Item: "Geometrical trigonometry, or, The explanation of such geometrical problems as are most useful & necessary, either for the construction of the canons of triangles, or for the solution of them together with the proportions themselves suteable unto every case both in plain and spherical triangles ... / by J. Newton ..." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A52262.0001.001. University of Michigan Library Digital Collections. Accessed June 14, 2025.

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Problem 10.

Two angles and the side between them given. to find the third angle.

This Probleme is the converse of the last, and to be resolved in the same manner, either at 3 operations, find∣ing first the other two sides by the 4th Probl. and then the third angle, by the 1 Propos.

Or, els by the 4 & 6 Propositions of this chap. the angles being first con∣verted into sides, and their contained side into an angle as hath been shew∣ed in the 12 Probl. of the last chap.