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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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## The first six books of the Elements of Euclid, with numerous exercises

Euclides - 1853 - 147 sider
...angles. LET the straight line ab make with cd, upon one side of it, the angles cba, abd : these are either two right angles, or are together equal to two right angles. For if the angle cba be equal to abd, each of them is a right angle (10 def.) ; but if not, from the...
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## Orr's Circle of the Sciences: The mathematical sciences

William Somerville Orr - 1854
...XIII.— THEOREM. T!te angles which one straight line (AB) makes with another (DC) upon me side of it, are either two right angles, or are together equal to two right anglet. For the angle А В С is either equal to ABD, or it is not. * Def. 8. If AB С be = AB D,...
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## The Elements of geometry; or, The first six books, with the eleventh and ...

Euclides - 1855
...straight line AB make with СD, upon one side of it, the two angles С BA, A 3 D. The*e angles are either two right angles, or are together equal to two right angles. For if the angle С BA bo equal to the angle ABD, each of them is a right angle (Def. 10). But if the...
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## Guide to the civil service examinations [by H. White]. By H. White

Henry White - 1856
...reciprocal proportion. 17 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. 18 Divide a straight line into two parts, so that the rectangle contained by the whole and ono of the...
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## Cambridge examination papers: a suppl. to the University calendar, 1856-59

...isosceles triangles. 2. 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. 3. If a straight line fall upon two parallel straight lines, it makes the alternate angles equal to...
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## Elements of Geometry and Conic Sections

Elias Loomis - 1857 - 226 sider
...straight line makes w^tk another, one side of it, are either two right angles, or are together equJ< to 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. For if the...
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## The Practice of Engineering Field Work, Applied to Land, Hydrographic, and ...

W. Davis Haskoll - 1858 - 324 sider
...— The 13th, Book I. 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. The 14th, Book I. If at a point in a straight line, two other straight lines, upon the opposite sides...
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## Examination papers used at the examinations for direct commissions [&c.].

War office - 1858 - 12 sider
...901. •• Euclid. 1. 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. 2. The straight lines which join the extremities of two equal and parallel straight lines towards the...
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## Elements of Geometry and Conic Sections

Elias Loomis - 1858 - 234 sider
...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. For if the angle ABC is equal to ABD, each of them is a right angle (Def. 10) ; but c K D if not, suppose...
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## Examination papers used at the examinations for admission to the Royal ...

Sandhurst roy. military coll - 1859 - 1869 sider
...another straight line ? 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. 2. The opposite sides and angles of parallelograms are equal to one another, and the diameter bisects...
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