Books Books 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. A course of geometrical drawing - Page 2
by William Schofield Binns - 1861 ## The Elements of Euclid, the parts read in the University of Cambridge [book ...

Euclides - 1846 - 292 pages
...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 (Def. 10) ; therefore CH is perpendicular to AB : Wherefore, from the given point C without it, CH... ## The Elements of Geometry, Symbolically Arranged

Great Britain. Admiralty - Geometry - 1846 - 130 pages
...The extremities of a superficies are lines. VII. A plane superficies is that in which any two «r C angle; and the straight line which 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 Elements of Geometry, Symbolically Arranged

Great Britain. Admiralty - Geometry - 1846 - 130 pages
...only one angle at a point, it may be expressed by a letter placed at that point, as the angle at E. X. angle; and the straight line which 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 Book of Euclid's Elements, Simplified, Explained, and Illustrated ...

Euclides - 1847 - 128 pages
...Definition 18. 10. When a straight line, standing on another straight line, makes the adjacent an. gles equal to one another, each of the angles is called...stands on the other is called a perpendicular to it. 11. An obtuse angle is that which is greater than a right angle. 12. An acute angle is that which is... ## The definitions, postulates, axioms, and enunciations of the propositions of ...

Euclides - 1848 - 52 pages
...line standing on another straight line, makes the adjacent angles equal to each other, each of these angles is called a right angle ; and the straight...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... ## Lessons on the delineation of form

Charles Richson - 1848 - 98 pages
...line standing on another straight line makes the adjacent angles equal to each other, each of these angles is called a right angle; and the straight line which stands on the other is called & perpendicular to it." QUESTION upon these definitions, if given. 27 II. — To draw four right (... ## The first three books of Euclid's Elements of geometry, with theorems and ...

Euclid, Thomas Tate - 1849 - 120 pages
...one angle at a point, it may be expressed by a letter placed at that point; as the ;ingle at E." ' x. When a straight line standing on another straight...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... ## An Epitome of Navigation and Nautical Astronomy, with Improved Lunar Tables ...

Janet Taylor - Nautical astronomy - 1851 - 702 pages
...points and quarter-points of the compass, cut off from the circle by the lines which form the angle. When a straight line standing on another straight...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 - 152 pages
...shall coincide with A. Observe that DE will fall nearer to AC or EF than BA does.] B 2 BOOK I. BOOK I. When a straight line standing on another straight...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... 