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 Βιβλία Βιβλία 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. The first book of Euclid's Elements, simplified, explained and illustrated ... - Σελίδα 6
των Euclides - 1847
Πλήρης προβολή - Σχετικά με αυτό το βιβλίο ## An Epitome of Navigation and Nautical Astronomy, with Improved Lunar Tables ...

Janet Taylor - 1851 - 621 σελίδες
...which form the angle. When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called...stands on the other is called a perpendicular to it : thus the line AC is perpendicular to DB, and makes with it the two adjacent angles CAD, CAB, equal... ## The First Two Books of the Elements of Euclid ... with Additional Figures ...

Euclides - 1852
...2 BOOK I. BOOK I. When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called...stands on the other is called a perpendicular to it. [That there may be two such angles equal, may be exhibited by the following figures: DC meets the right... ## The geometry, by T. S. Davies. Conic sections, by Stephen Fenwick

...the angle at E. 10. When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called...a perpendicular to it. 11. An obtuse angle is that \vhich is greater than a right angle. 12. An acute angle is that which is less than a right angle.... ## The synoptical Euclid; being the first four books of Euclid's Elements of ...

Euclides - 1853
...the angle at E." x. When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called...stands on the other is called a perpendicular to it. XI. An obtuse angle is that which is greater than a right angle. XII. An acute angle is that which... ## The first six books of the Elements of Euclid, with numerous exercises

Euclides - 1853 - 147 σελίδες
...another straight line makes the adjacent angles equal to one another, each of the angles is called a rigM angle ; and the straight line which stands on the other is called a perpendicular toit. XI. An obtuse angle is that which is greater than a right angle. XII. An acute angle is that... ## Orr's Circle of the Sciences: The mathematical sciences

William Somerville Orr - 1854
...straight line (AB) standing on another straight line (CD) makes the adjacent angles (А В С, А В D) equal to one another, each of the angles is called a right angle ; and the straight lines are said to be perpendicular to each other. Thus the two lines, AB, CD, are perpendicular to... ## The Elements of geometry; or, The first six books, with the eleventh and ...

Euclides - 1855
...line standing on another straight line makes the adjacent angles equal to one another, each of these angles is called a right angle ; and the straight...stands on the other is called a perpendicular to it. By borrowing the terms vertical and horizontal from the language of Physics, we may define a right... ## Mensuration of lines, areas, surfaces, and volumes

Robert Rawson - 1856
...as the angle at E." When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called...stands on the other is called a perpendicular to it. XL An obtuse angle is that which is greater than a right angle. xn. An acute angle is that which is... ## The geometry of the three first books of Euclid, by direct proof from ...

Euclides - 1856
...When a straight line standing on another straight line makes the adjacent angles equal to each other, each of the angles is called a right angle, and the...straight line which stands on the other is called perpendicular. PROPOSITIONS, i. Straight lines from the same point and in the same direction coincide.... ## APPLETONS' CYCLOPAEDIA OF DRAWING

W.E. WORTHEN - 1857
...as the angle at E.' 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 lines are said to be perpendicular to each other (fig. 3). An obtuse <mgle is that which is greater...