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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. Euclid, books i. & ii., with notes, examples, and explanations, by a late ... - Σελίδα 1
των Euclides - 1879
Πλήρης προβολή - Σχετικά με αυτό το βιβλίο ## The Elements of geometry; or, The first six books, with the eleventh and ...

Euclides - 1855
...is put in inverted commas, as being Dr. Simson's addition ; it is very necessary to be remembered. X When a straight line standing on another 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
...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...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
...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.... ## Gradations in Euclid : books i. and ii., with an explanatory preface [&c ...

Euclides - 1858
...When a straight line standing on another straight lino 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. The angle CD A being equal to angle CDB, each of them is a right angle, and CD is a perpendicular to... ## Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with ...

Robert Potts - 1860 - 361 σελίδες
...the angle ABD, or DBA ; and that which is contained by DB, CB, is called the angle DBC, or CBD. X. When a straight line standing on another straight...stands on the other is called a perpendicular to it. XL An obtuse angle is that which is greater than a right angle. XIL An acute angle is that which is... ## Euclid's Elements of plane geometry [book 1-6] explicitly enunciated, by J ...

Euclides - 1860
...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...stands on the other is called a perpendicular to it. 12. The two adjacent angles which one straight line makes with another on the same side of it are called... ## A course of geometrical drawing

William Schofield Binns - 1861
...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." The angles AB c, ABD, are right angles. Obs. 1. Because DB is in the same straight line with B c, the... ## Euclid's plane geometry, books iii.-vi., practically applied; or, Gradations ...

Euclides - 1861
...st. line makes the adj. ¿_s equal to each other, each of these /.s is called a rt. ¿_ ; and the st. line which stands on the other is called a perpendicular to it. Ax. 1. Things which are equal to the same thing are equal to one another. EI 2 CI 2 Dat. Quass. Pst.... ## Euclid's Elements of geometry, books i. ii. iii. iv

Euclides - 1862
...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...stands on the other is called a perpendicular to it. 1 1 . An obtuse angle is that which is greater than a right angle. 13. A term or boundary is the extremity... ## The elements of plane geometry; or, The first six books of Euclid, ed. by W ...

Euclides - 1863
...only one angle at a point, it may be expressed by a letter placed at that point; as the angle at E. X. When a straight line standing on another straight...right angle ; and the straight line which stands on tbo other is called a perpendicular to it —!— XI. An obtuse angle is that which is greater than...