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" A cone is a body conceived to be formed by the revolution of a right-angled triangle about one of its sides containing the right angle. "
Industrial Drawing and Geometry: An Introduction to Various Branches of ... - Page 166
by Henry John Spooner - 1911 - 169 pages
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An essay on mechanical geometry, explanatory of a set of models

Benjamin Donne - 1796 - 120 pages
...fquares the piece is called, by workmen, a piece equally fquared. No. 10. 4. A Cylinder is a figure which may be conceived to be generated by the revolution of a right-angled parallelogram about one * The folids are made in wood, and to prevent miftakes, have numbers flamped...
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Encyclopaedia Perthensis; Or Universal Dictionary of the Arts ..., Volume 10

Encyclopedias and dictionaries - 1816 - 764 pages
...meeting at a point above tin bafe, call, d the VERTEX of the pyramid. Fig. 6Z. 78. A CONE is a folid, conceived to be generated by the revolution of a right-angled triangle about its perpendicular, which fixed line is called the Axis of the cone. Fif. 69. 79. A SPHERE is a folid...
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The Cyclopędia, Or, Universal Dictionary of Arts, Sciences, and ..., Volume 34

Abraham Rees - Art - 1819 - 754 pages
...reprefented by FGD E. PROB. XIII. To find the covering of the curved fuperficies of a cone, fuch as may be generated by the revolution of a right-angled triangle about one of its perpendicular legs. With a radius equal to the flant fide of the cone dcfcribe an arc. Make the length...
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A Treatise on the Elements of Algebra

Bewick Bridge - Algebra - 1821 - 648 pages
...should not have cut the Curve. CONIC SECTIONS. CHAP. I. INTRODUCTION. A CONE is a solid figure formed by the revolution of a right-angled triangle about one of its sides (Euc. B. XI. Def. 18.). From the manner in which this solid is generated, it is evident that if it...
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Elements of Science and Art: Being a Familiar Introduction to ..., Volume 2

John Imison - Art - 1822 - 488 pages
...and its sides a convex surface, and terminating in a point A called the vertex or apex of the cone. It may be conceived to be generated by the revolution of a right-angled triangle about its perpendicular. A line drawn from the vertex to the centre of the base, is the axis of the cone....
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The Operative Mechanic, and British Machinist: Being a Practical ..., Volume 1

John Nicholson - Machinery - 1825 - 838 pages
...hase, and its sides a convex surface, terminating in a point A, called the vertex or apex of the cone. It may be conceived to be generated by the revolution of a right-angled triangle about its perpendicular. 65. A line drawn from the vertex to the centre of the base is the axis of the cone....
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Geometry, Plane, Solid, and Spherical, in Six Books: To which is Added, in ...

Pierce Morton - Geometry - 1830 - 584 pages
...be cut by a plane, in order that the section may be one of these curves. A right cone is the solid generated by the revolution of a right-angled triangle about one of its perpendicular sides. The fixed side, OH, about which the triangle revolves, is called theaxis ; and...
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Elements of Descriptive Geometry: With Their Application to Spherical ...

Charles Davies - Geometry, Descriptive - 1835 - 256 pages
...perpendicular to its base, If the base be a circle, such cone is a right cone with a circular base ; it can be generated by the revolution of a right-angled triangle about one of its legs, and its rectilinear elements make equal angles with the axis. This is the kind of cone treated...
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A complete treatise on practical land-surveying

Thomas Holliday - Surveying - 1838 - 404 pages
...pyramid. 7. Pyramids of equal bases and altitudes are equal to each other. 9. A cone is a solid formed by the revolution of a rightangled triangle about,...one of its sides containing the right angle, which side remains fixed, and is called the axis of the cone. Or, a cone is a pyramid of an infinite number...
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The doctrine of limits, with its applications

William Whewell - 1838 - 204 pages
...= 0. (5) 4у2 - 8xy + a?2 + 4у + 2a? - 2 = О. (6) tf-Zxy + a? -8x + 16 = 0. 39- A cone is a solid generated by the revolution of a right-angled triangle about one of its sides. The angle contained between the fixed side and the hypothenuse of the triangle is the vertical angle....
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