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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. Geometry Without Axioms; Or the First Book of Euclid's Elements. With ... - Σελίδα 51
των Thomas Perronet Thompson - 1833 - 150 σελίδες
Πλήρης προβολή - Σχετικά με αυτό το βιβλίο ## 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, Robert Simson - 1892 - 518 σελίδες
...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 line...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... ## Plane and Solid Geometry

James Howard Gore - 1898 - 210 σελίδες
...other. 35. 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... ## 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... ## Mathematics: Mechanic's bids and estimates. Mensuration for beginners. Easy ...

Seymour Eaton - 1899 - 340 σελίδες
...lines to each other in a plane, which meet, but are not in the same straight line (A). MATHEMATTCS 8. When a straight line standing on another straight line makes the adjacent angles equal, each is called a right angle (B). The line which stands upon the other is called a perpendicular to... ## Imperial Reference Library: Comprising a General Encylopædia ...

1898
...6m, is named the angle с m Ъ. — When a straight line, cm, standing on another straight line, a b. makes the adjacent angles equal to one another, each of the angles erne, cmb, is culled a right anglr; and the straight lines are said to be perpendicular to each other.... ## A Text-book of Euclid's Elements for the Use of Schools, Books I.-IV.

Henry Sinclair Hall, Frederick Haller Stevens - 1900 - 304 σελίδες
...to be verticaIIy opposite. The two angles CEB, AED are also vertically opposite to one another. 10. When a straight line standing on another straight...stands on the other is called a perpendicular to it. 1 1 . An obtuse angle is an angle which is greater than a right angle. 12. An acute angle is an angle... ## Ellen: Or, Whisperings of an Old Pine, Τόμος 1

Joseph Battell - 1903
...would be reasonably correct ; but in most respects not as accurate as that of Euclid, which reads : 'When a 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... ## First Stage Practical Plane and Solid Geometry

G. F. Burn - 1903 - 255 σελίδες
...angle, and obtuse when greater than a right angle. Angle CAB or angle A = 40°, is indicated thus : 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 angle; and the straight line which... ## A Text-book of Euclid's Elements for the Use of Schools, Βιβλίο 1

Euclid - 1904 - 456 σελίδες
...to be vertically opposite. The two angles CEB, AED are also vertically opposite to one another. 10. When a straight line standing on another straight...stands on the other is called a perpendicular to it. 1 1 . An obtuse angle is an angle which is greater than a right angle. 12. An acute angle is an angle...