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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 ## Elementary Physiography: An Introduction to the Study of Nature

John Thornton - 1888 - 248 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.' We find it convenient for the purposes of angular measurement to divide the right angle into smaller... ## The Harpur Euclid: An Edition of Euclid's Elements

Edward Mann Langley, W. Seys Phillips - 1890 - 515 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 which stands on the other is said to be perpendicular, or at right angles, to it. The symbol for ' perpendicular 'is x r. The student... ## The Elements of Plane and Solid Geometry ...

Edward Albert Bowser - 1890 - 393 σελίδες
...said to bisect the angle between the non-coincident sides BA and BE. Fig. 6 Fig. 7 0 Fig. 8 O Fig. 9 called a right angle; and the straight line which stands on the other is said to be perpendicular or at right angles to it. Thus, if the adjacent angles AOC and BOC are equal... ## The Elements of Euclid: Viz. the First Six Books, Together with the Eleventh ...

Euclid - 1892 - 518 σελίδες
...Def. 11. therefore the angle CHF is equal to the angle CHG ; I. 8. and these are adjacent angles. But when a straight line, standing on another straight...stands on the other is called a perpendicular to it. Therefore CH is a perpendicular drawn to the given straight line AB from the given point C without... ## Euclid's Elements of Geometry, Βιβλία 1-6

Henry Martyn Taylor - 1893 - 504 σελίδες
...DEFINITION 11. If two adjacent angles made by two straight lines at the point where they meet be equal, each of these angles is called a right angle, and the straight lines are said to be at right angles to each other. Either of two straight lines which C are at right... ## Euclid's Elements of Geometry, Βιβλία 1-6;Βιβλίο 11

Henry Martyn Taylor - 1895 - 657 σελίδες
...DEFINITION 11. If two adjacent angles made by two straight lines at the point where they meet be equal, each of these angles is called a right angle, and the straight lines are said to be at right angles to each other. Either of two straight lines which C are at right... ## Plane and Solid Geometry

James Howard Gore - 1898 - 210 σελίδες
...When a straight line standing on another makes the adjacent angles equal to each other, f each of the angles is called a Right Angle; and the straight line which stands ou the other side is said to be perpendicular or at right angles to it. A_ Thus, if the adjacent angles... ## Mathematics: Mechanic's bids and estimates. Mensuration for beginners. Easy ...

Seymour Eaton - 1899 - 340 σελίδες
...straight line standing on another straight line makes the adjacent angles equal to one another, I v/ \ GB each of these angles is called a right angle, and...stands on the other is called a perpendicular to it (Definitions). Therefore CH is a perpendicular drawn to the given straight line AB from the given point... ## Elementary Physiography: An Introduction to the Study of Nature

John Thornton - 1899 - 427 σελίδες
...makes the adjaG. 9.— Pendulum swinging cent angles equal to one another, each through arc /«. r .1 and the straight line which stands on the other is called a perpendicular to it." Notice that " perpendicular " does not always mean upright, but making equal angles on both or all... ## A Text-book of Euclid's Elements for the Use of Schools, Books I.-IV., Βιβλίο 1

Henry Sinclair Hall, Frederick Haller Stevens - 1900 - 304 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 NOTE....