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F, which is the common vertex of the triangles ; that is, together with four right angles. Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
The Elements of Euclid, Viz: The Errors, by which Theon, Or Others, Have ... - Side 38
av Robert Simson - 1775 - 520 sider
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## The Elements of Euclid: Also the Book of Euclid's Data ...cor. viz. The ...

Robert Simson - 1804
...together with the angles at Cor. the point F which is the common Vertex of the triangles; that is », 1' together with four right angles. Therefore all the...together with four right angles, are equal to twice as manyright angles as the figure has fides. CoR. 2. All the exterior angles of any rectilineal figure...
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## Elements of Geometry;: Containing the First Six Books of Euclid, with a ...

Euclid, John Playfair - 1804 - 440 sider
...right angles as there are triangles b ; that is, as there are fides in the figure BCDEF ; and becaufe all the angles of the figure, .together with four right angles, are likewise equal to twice as many right angles as there are fides in the c i. cor. figure c ; therefore...
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## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - 1806 - 518 sider
...at the point a 2. Cor. F, which is the common vertex of the triangles ; that is », to15. 1. gether with four right angles. Therefore all the angles of...equal to twice as many right angles as the figure has sides. CoR. 2. All the exterior angles of any rectilineal figure, are together equal to four right...
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## The Accomplished Tutor; Or, Complete System of Liberal Education ..., Volum 1

Thomas Hodson - 1806 - 458 sider
...work ; — add all the inward angles ABC, &c. together ; and if the work be right, the fum will be equal to twice as many right angles as the figure has fides, except four right angles ; but when there is an angle that bends inwards, as at F, and you meafure...
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## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1806 - 311 sider
...to all the angles of the figure, together with four right angles, that is, the angles of the figure are equal to twice as many right angles as the figure has sides, wanting four. COR. 2. All the exterior angles of any rectilineal figure are together equal to...
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## Elements of Geometry, Geometrical Analysis, and Plane Trigonometry ...

Sir John Leslie - 1809 - 524 sider
...interior one AED, is equal to two right angles. All the exterior angles therefore, added to the interior angles, are equal to twice as many right angles as the figure has sides. Consequently the exterior angles are equal to the four right angles which, by the last Proposition,...
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## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid - 1810 - 518 sider
...as many right angles as there are triangles, that is, as there are sides of the figure; and the same angles are equal to the angles of the figure, together...equal to twice as many right angles as the figure has sides. Con. 2. All the exterior angles of any rectilineal figure, are .together equal to four right...
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## The Elements of Euclid; viz. the first six books, together with the eleventh ...

Euclides - 1814
...the same angles are equal to the angles of the figure, together with the angles at the point F, which together with four right angles, are equal to twice as many right angles as the figure has sides. Cor. 2. All the exterior angles of any rectilineal figure are together equal to four right angles....
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## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclides - 1816 - 528 sider
...anglesat the point F, which , "2 Cor. is the common vertex of the triangles : that is a, together is. 1. with four right angles. Therefore all the angles of...equal to twice as many right angles as the figure has sides. Cor. 2. All the exterior angles of any rectilineal figure' are together equal to four right...
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## Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - 1819 - 333 sider
...angles as there are triangles (32. 1.) ; that is, as there are sides in the figure BCDEF ; and because all the angles of the figure, together with four right angles, are likewise equal to twice as many right angles as there are sides in the figure (cor. 1. 32. 1.) ; therefore...
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