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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. "
Euclid, books i. & ii., with notes, examples, and explanations, by a late ... - Σελίδα 1
των Euclides - 1879
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First Stage Practical Plane and Solid Geometry

G. F. Burn - 1903 - 255 σελίδες
...: When a straight line standing on another straight line makes the adjacent angles equal ' pjg. 5. to one another, each of these angles is called a right...stands on the other is called a perpendicular to it. Parallel lines are such that, if produced ever so far both ways, do not meet. The complement of an...

Ellen: Or, Whisperings of an Old Pine, Τόμος 1

Joseph Battell - 1903
...straight line standing on another straight line makes the adjacent angles equal to one another, the angle is called a right angle ; and the straight line which...stands on the other is called a perpendicular to it.' "Ellen notices another error in a remark under this definition, viz. : 'When a straight line is perpendicular...

A Text-book of Euclid's Elements for the Use of Schools, Βιβλίο 1

Euclid - 1904 - 456 σελίδες
...adjacent angles. But when one straight line, standing on another, makes the adjacent angles equal, each of these angles is called a right angle, and...stands on the other is called a perpendicular to it. Def. 10. Therefore CH is perpendicular to AB, and has been drawn from the point C without it. QEF QUESTIONS...

Practical Mechanical Drawing and Machine Design, Self Taught ...

Charles Westinghouse - 1906 - 157 σελίδες
...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...stands on the other is called a perpendicular to it as in Fig. 35. An obtuse angle is that which is greater than a right angle as in Fig. 36. Fig. 36....

Encyclopedia of Engineering: A Treatise on Boilers, Steam Engines ..., Τόμος 7

Calvin Franklin Swingle - 1906
...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...stands on the other is called a perpendicular to it as in Fig 35. Fig. 38. An obtuse angle is that which is greater than a right angle as in Fig. 36. An...

Modern Sheet-metal Workers' Instructor: Practical Geometry, Mensuration ...

Joseph H. Rose - 1906 - 309 σελίδες
...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...stands on the other is called a perpendicular to it as in Fig. 2. GEOMETEIIAI A tine s Ls-^ri "w^i Th? ai/K "..« if i : A straigfe: extreme p:ira». A...

The advanced class-book of modern geography, by W. Hughes and J.F. Williams ...

William Hughes - 1908
...when a straight line standing on another straight line makes the adjacent angles equal to each other. Each of these angles is called a right angle, and...stands on the other is called a perpendicular to it. An Obtuse Angle is greater, and an Acute Angle is less, than a right angle. A Term or Boundary is the...

Standard American Cyclopedia of Steam Engineering: A Treatise on the Care ...

Calvin Franklin Swingle - 1913 - 1249 σελίδες
...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...stands on the other is called a perpendicular to it as in Fig 35. Fig. 36. An obtuse angle is that which is greater than a right angle- as in Fig. 36....

The Sheet-Metal Worker's Instructor

R. H. Warn, John G. Horner - 2002 - 284 σελίδες
...straight liue, B, makes the adjacent angles equal to one another, each of B Fig. 1. Fig. 2. the angles Ls called a right angle, and the straight line which...stands on the other is called a perpendicular to it (Fig. 2). 8. An obtuse angle is that which is greater than a right angle (Fig. 3). 9- An acute angle...
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