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" ABD, is equal* to two right angles, 13. 1. therefore all the interior, together with all the exterior angles of the figure, are equal to twice as many right angles as there are sides of the figure; that is, by the foregoing corollary, they are equal... "
Elements of Geometry, Briefly, Yet Plainly Demonstrated by Edmund Stone - Page 33
by Euclid - 1728
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Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - Euclid's Elements - 1806 - 311 pages
...angles'" ; therefore all the interior, together with all the exterior angles of the figure, are equal to twice as many right angles as there are sides of the figure ; that is, by the foregoing corollary, they are equal to all the interior angles of the figure, together...
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The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - Trigonometry - 1806 - 518 pages
...angles ; therefore all the interior, together with all the exterior angles of the figure, are equal to twice as many right angles as there are sides of the figure : D — that is, by the foregoing corollary, they are equal to all the interior angles of the figure,...
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Elements of Geometry: Containing the First Six Books of Euclid, with a ...

John Playfair - Euclid's Elements - 1819 - 333 pages
...angles ; therefore all the interior, together with all the exterior angles of the figure, are equal to twice as many right angles as there are sides of the figure ; that is, by the foregoing corollary, they are equal to all the interior angles of the figure, together...
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A Popular Course of Pure and Mixed Mathematics ...: With Tables of ...

Peter Nicholson - Mathematics - 1825 - 372 pages
...angles ; therefore all the interior together with all the exterior angles of the figure, are equal to twice as many right angles as there are sides of the figure j that is, by the foregoing corollary, they are equal to all the interior angles figure, together with...
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The Elements of Euclid: The Errors by which Theon, Or Others, Have Long ...

Robert Simson - Trigonometry - 1827 - 513 pages
...angles; therefore all the interior, together with all the exterior angles of the figure, are equal to twice as many right angles as there are sides of the figure; that is, by the foregoing corollary, they are equal to all the interior angles of the figure, together...
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Elements of Geometry: Being Chiefly a Selection from Playfair's Geometry

John Playfair - Geometry - 1829 - 186 pages
...there are sides of the figure. But all the interior angles together with four right angles are equal to twice as many right angles as there are sides of the figure (Prop. L). Therefore all the interior and all the exterior angles are together equal to all the interior...
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The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid - 1835 - 513 pages
...angles; therefore all the interior, together with all the exterior angles of the figure, are equal to twice as many right angles as there are sides of the figure ; that is, by the foregoing corollary, they are equal to all the interior angles of the figure to-...
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The Element of Geometry

John Playfair - Geometry - 1836 - 114 pages
...angles ; therefore all the interior together with all the exterior angles of the figure, are equal to twice as many right angles as there are sides of the figure, that is, by the foregoing Corollary, they are equal to all the interior angles of the figure, together...
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The Elements of Euclid; viz. the first six books,together with the eleventh ...

Euclides - Geometry - 1841 - 351 pages
...13. 1. therefore all the interior, together with all the exterior angles of the figure, are equal to twice as many right angles as there are sides of the figure; that is, by the foregoing corollary, they are equal to all the interior angles of the figure, together...
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Elements of geometry: consisting of the first four,and the sixth, books of ...

Euclides - 1842
...angles ; therefore all the interior together with all the exterior angles of the figure are equal to twice as many right angles as there are sides of the figure ; that is, by the foregoing corollary, they are equal to all the interior angles of the figure, together...
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