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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 and Conic Sections - Page 10
by Elias Loomis - 1857 - 226 pages
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Standard American Cyclopedia of Steam Engineering: A Treatise on the Care ...

Calvin Franklin Swingle - Steam engineering - 1913 - 1270 pages
...are not in the 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...
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YALE YESTERDAYS

CLARENCE DEMING - 1915 - 340 pages
...obsecrationem audi. and the text of a sermon of the Class of '52 reads: "When a straight line standing on another straight line makes the adjacent angles equal to one another each of these angles is called a three and a half and the line thus placed is called a rush." RHYMES OF THE...
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Stories about Mathematics-land, Volume 2

D. Ponton - Mathematics - 1927 - 168 pages
...Angles are those made when two straight lines cross one another. 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...
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Geometry, Relativity, and the Fourth Dimension

Rudy von Bitter Rucker - Science - 1977 - 166 pages
...of this 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...
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The Foundations of Geometry and the Non-Euclidean Plane

G.E. Martin - Mathematics - 1997 - 536 pages
...containing the 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...
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Geometry and the Visual Arts

Daniel Pedoe - Mathematics - 1983 - 340 pages
...containing the 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...
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Geometry: A Comprehensive Course

Daniel Pedoe - Mathematics - 1988 - 468 pages
...containing the 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...
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Collected Works of Bernard Lonergan: Collection

Bernard J. F. Lonergan, Robert M. Doran - Philosophy - 1988 - 372 pages
...straight lines. It is a nominal definition. The tenth definition reads: '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...
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A Commentary on the First Book of Euclid's Elements

Proclus - Philosophy - 1992 - 432 pages
...has primacy over the things that are plural and separated. X-XII. When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is a right angle and the straight line standing on the other is called a perpendicular...
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Thinking Things Through: An Introduction to Philosophical Issues and ...

Clark Glymour - Psychology - 1997 - 406 pages
...containing the angle are straight, the angle is called rectilinear. 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...
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