Books Books
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 - 1849 - 226 pages

## 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...

## 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...

## 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...

## 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...

## 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...

## 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...

## 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...

## 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...