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" The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make with CD, upon one side of it, the angles CBA, ABD : these shall either be... "
Elements of Geometry: Containing the First Six Books of Euclid, with a ... - Side 21
av John Playfair - 1847 - 317 sider
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Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with ...

Robert Potts - 1860 - 361 sider
...PROPOSITION XIH. THEOREM. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to...with CD, upon one side of it, the angles CBA, ABD. Then these shall be either two right angles, or, shall be together, equal to two right angles. £ A...
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The popular educator, Volum 3

Popular educator - 1860
...make with D c, upon one side of it, the two angles c BA Fig. 13. and AB D. These angles are ei-.her two right angles, or are together equal to two right angles. For, if the angle CBA, be equal to the D angle ADD, then each of them is a light angle, by Def. 10. But, if the angle cn A be not equal...
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Euclid's Elements of plane geometry [book 1-6] explicitly enunciated, by J ...

Euclides - 1860
...PROPOSITION XIII. THEOREM. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. '.- Given the straight line AB making with CD, upon one side of it, the angles CBA and ABD ; to prove...
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The examination papers as set for the preliminary literary examination of ...

Royal college of surgeons of England - 1860
...parallelogram, rectangle. 2. The angles which one straight line makes with another, on one side of it, are either two right angles, or are together equal to two right angles. Having proved this proposition, state (without proving) its converse. If the two portions ABO, DBC...
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ELEMENTS OF GEOMETRY AND CONIC SECTIONS

ELIAS LOOMIS, LL.D. - 1861
...straight line makes w^th another,upon one side of it, are either two right angles, or are together io two right angles. Let the straight line AB make with CD, upon one side of it, the angles ABC, ABD ; these are either two right angles, or are together equal to two right angles. A B *f not,...
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The Projection and Calculation of the Sphere for Young Sea Officers Being a ...

S. M. Saxby - 1861 - 112 sider
...advantage. Book I. XIII. — The angles which one right line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. Departing from the precise language of absolute and complete proof (for obvious reasons), we may say...
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The school Euclid: comprising the first four books, by A.K. Isbister

Euclides - 1862
...PROP. XIII. — THEOREM. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles. (References— Prop. i. 11; ax. 1, 2; def. 10.) Let the straight line AB make with CD, upon one side...
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Study of Steam and the Marine Engine for Young Sea Officers in H.M. Navy ...

S. M. Saxby - 1862 - 179 sider
...advantage. Book I. XIII. — The angles which one right line makes with another upon one side of it are either two right angles or are together equal to two right angles. Departing from the precise language of absolute and complete proof (for obvious reasons), we may say...
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Euclid's Elements of geometry, the first four books, by R. Potts. Corrected ...

Euclides - 1864
...PROPOSITION XIII. THEOREM. The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to...with CD, upon one side of it, the angles CBA, ABD. Then these shall be either two right angles, or, shall be together, equal to two right angles. £ A...
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The school edition. Euclid's Elements of geometry, the first six books, by R ...

Euclides - 1864
...PROPOSITION XIII. THEOREM. The angles which otie straight line makes with another upon one side of it, are either two right angles, or are together equal to...with CD, upon one side of it, the angles CBA, ABD. Then these shall be either two right angles, or, shall be together, equal to two right angles. A E...
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