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When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle; and the straight line which stands on the other is called a perpendicular to it.
Elements of Geometry;: Containing the First Six Books of Euclid, with a ... - Página 2
por Euclid, John Playfair - 1804 - 440 páginas
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## Modern Sheet-metal Workers' Instructor: Practical Geometry, Mensuration ...

Joseph H. Rose - 1906 - 309 páginas
...same straight line as in Fig. 1. Fig. 1. Fig. 2. When a straight line, standing on another straight line, makes the adjacent angles equal to one another,...each of the angles is called a right angle and the straight line which stands on the other is called a perpendicular to it as in Fig. 2. GEOMETEIIAI A...
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## Practical Mechanical Drawing and Machine Design, Self Taught ...

Charles Westinghouse - 1906 - 157 páginas
...are not in the same straight line as in Fig. 34. When a straight line, standing on another straight line, makes the adjacent angles equal to one another,...each of the angles is called a right angle and the straight line which stands on the other is called a perpendicular to it as in Fig. 35. An obtuse angle...
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## Encyclopedia of Engineering: A Treatise on Boilers, Steam Engines ..., Volumen7

Calvin Franklin Swingle - 1906
...same straight line as in Fig. 34. Fi(. 34. Fig 35. When a straight line, standing on another straight line, makes the adjacent angles equal to one another,...each of the angles is called a right angle and the straight line which stands on the other is called a perpendicular to it as in Fig 35. Fig. 38. An obtuse...
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## A School Geometry, Partes1-4

Henry Sinclair Hall - 1908
...also vertically opposite to one another. 7, When one straight line stands on another so as to make the adjacent angles equal to one another, each of the angles is called a right angle • and each line is said to be perpendicular to the other. AXIOMS, (i) If O is a point in a straight line...
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## Introduction and books 1,2

Euclid - 1908
...the angle ECF; [i. 8] and they are adjacent angles. But, when a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal ingles is right ; [Def. 10] therefore each of the angles DCF> FCE is right. Therefore the straight...
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## The Teaching of Geometry

David Eugene Smith - 1911 - 339 páginas
...confine our attention to having the concept understood. 10. When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular to that...
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## Standard American Cyclopedia of Steam Engineering: A Treatise on the Care ...

Calvin Franklin Swingle - 1913 - 1249 páginas
...same straight line as in Fig. 34. Fig. 34. Fig. 35. When a straight line, standing on another straight line, makes the adjacent angles equal to one another,...each of the angles is called a right angle and the straight line which stands on the other is called a perpendicular to it as in Fig 35. Fig. 36. An obtuse...
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## Geometry, Relativity, and the Fourth Dimension

Rudy von Bitter Rucker - 1977 - 133 páginas
...postulate is not clear until we have defined right angles: "When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right." This postulate seems to be equivalent to the assumption that the things we...
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## The Foundations of Geometry and the Non-Euclidean Plane

G.E. Martin - 1997 - 512 páginas
...angle are straight, the angle is called rectilineal. 10. When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular to that...
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## Geometry and the Visual Arts

Daniel Pedoe - 1983 - 296 páginas
...angle are straight, the angle is called rectilineal. 10. When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular to that...
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