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If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line.
The Elements of Geometry, Symbolically Arranged - Side 21
av Great Britain. Admiralty - 1846
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## The Bombay university calendar, Volum 1

Bombay city, univ - 1880
...quadrilateral form a parallelogram. 2. If, at a point in a straight linn, two other straight 10 lines on the opposite sides of it make the adjacent angles...lines shall be in one and the same straight line. ABCD is a parallelogram whose diagonals meet in O. Show that if the parallelograms AOBP, DOCQbe completed,...
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## The Elements of Euclid for the Use of Schools and Colleges: With Notes, an ...

Isaac Todhunter - 1880 - 400 sider
...T> F BC K. H And because at the point H in the straight line GH, the two straight lines KH, HM, on the opposite sides of it, make the adjacent angles together equal to two right angles, KH is in the same straight line with HM. [I. 14. And because the straight line HG meets the parallels...
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## The pupil teachers' handy mathematical and grammatical question-book, with key

Pupil teachers - 1880
...of the bisections of the interior and exterior angles at the base are in the same straight line. 14. If at a point in a straight line two other straight lines, upon the opposite side of it, make the adjacent angles together equal to two right angles; then these two straight lines...
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## An Elementary Geometry: Plane, Solid and Spherical

William Frothingham Bradbury - 1880 - 240 sider
...therefore the sum of all the angles at the point B is equal to four right angles. THEOREM III. 47i If at a point in a straight line two other straight lines upon opposite sides of it .make the sum of tfie adjacent angles equal to two right angles, these two lines...
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## Euclid for beginners, books i. and ii., with simple exercises by F.B. Harvey

Euclid, F. B. Harvey - 1880 - 119 sider
...right side of the figure. - Ie the double angle on the left side of the figure. PROP. XIV. THEOREM. If at a point in a straight line, two other straight lines, upon opposite sides of it, make the adjacent angles together equal to two right angles, then these two straight...
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## First principles of Euclid: an introduction to the study of the first book ...

T S. Taylor - 1880
...(Euclid I. 14). Repeat. — The enunciation of Euc. I. 13 and Axioms 3<z and n. General Enunciation. If, at a point in a straight line, two other straight lines, on the opposite sides of it, make the adjacent angles together equal to two right angles, those two...
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## Examination papers, and division lists, &c. [afterw.] General certificate of ...

Oxford univ, local exams - 1880
...superficies, a square, a parallelogram. What is Euclid's axiom about lines which will meet when produced ? 2. If at a point in a straight line two other straight lines, on the opposite sides of it, make the adjacent angles together equal to two right angles, these two...
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## Moffatt's reprint of pupil teachers' questions, arranged by ed. of 'Papers ...

Moffatt and Paige - 1881 - 1880 sider
...trapezvum. What is the hypothesis, and what is the conclusion in the enunciation of the 5th proposition 1 2. If at a point in a straight line, two other straight...adjacent angles together equal to two right angles ; then these two straight lines shall be in one and the same straight line. 3. If two triangles have...
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## The Cambridge Examiner, Volum 3

1883
...proposition, theorem, •problem, hypothesis. 3. If at a point in a straight line two other straight lines on the opposite sides of it make the adjacent angles...lines shall be in one and the same straight line. 4. ABCD is a quadrilateral, of which AD is the longest side and BC the shortest ; shew that angle ABC...
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## The Elements of geometry; or, The first six books, with the eleventh and ...

Euclides - 1881
...Therefore BD is in the same straight line with CB. Wherefore, i£ at a point, &c. QED Corollary.— IS at a point In a straight line, two other straight lines upon the iams aide of it, make each a right angle with it, these two straight lines shall coincide with each...
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