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 10by Elias Loomis - 1857 - 226 pagesFull view - About this book
| Underwood Dudley - Mathematics - 1992 - 388 pages
...prefer to leave the term undefined — but others were just fine: 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... | |
| Saul Stahl - Mathematics - 1993 - 320 pages
...conclusions, and that Euclid felt the need to acknowledge their efforts. 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... | |
| Keith Devlin - Mathematics - 1996 - 228 pages
...is a line that lies evenly with the points on itself. Definition 10 When a straight line standing on **another 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... | |
| Howard Whitley Eves - Mathematics - 1997 - 370 pages
...are straight lines, the angle is called a rectilinear angle. 10. When a straight line erected on a **straight line makes the adjacent angles equal to one another, each of** the equal angles is called a right angle, and the straight line standing on the other is called a perpendicular... | |
| David A. Singer - Mathematics - 1998 - 176 pages
...review what we know about right angles. Euclid's tenth definition says: 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... | |
| Nick Huggett - Philosophy - 1999 - 292 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... | |
| Reinhard Laubenbacher, David Pengelley - Mathematics - 2000 - 292 pages
...parallel postulate itself. Euclid, from Elements BOOK I. DEFINITION 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... | |
| Judith Cederberg - Mathematics - 2004 - 472 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 Reprinted with permission of Cambridge University Press from The Thirteen... | |
| William P. Berlinghoff, Kerry E. Grant, Dale Skrien - Mathematics - 2001 - 672 pages
...describe familiar figures in more or less familiar ways. For example: « When a straight line crossing a **straight line makes the adjacent angles equal to one another, each of** the equal angles is called a right angle, and the straight line crossing the other is called a perpendicular... | |
| Audun Holme - Mathematics - 2002 - 408 pages
...containing the angle are straight, the angle is caller rectilinear. 9. When a straight line set up on a **straight line makes the adjacent angles equal to one another, each of** the angles is right, and the straight line standing on the other is called the perpendicular to the... | |
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