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" A cone is a solid bounded by a conical surface and a plane which cuts the conical surface. The plane is called the base and the curved surface the lateral area. "
Elements of Descriptive Geometry - Page 100
by George Frederick Blessing, Lewis Andrew Darling - 1912 - 219 pages
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Elements of Plane and Solid Geometry

George Albert Wentworth - Geometry - 1877 - 416 pages
...straight line consists of two portions, called Nappes, one the Lower, the other the Upper Nappe. 632. DEF. A Cone is a solid bounded by a conical surface and a plane. 633. DEF. The Lateral surface of a cone is its conical surface. 634. DEF. The Base of a cone is its...
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Metrical Geometry: An Elementary Treatise on Mensuration

George Bruce Halsted - Measurement - 1881 - 258 pages
...is generated by a straight line moving so as always to pass through a fixed point called the vertex. A cone is a. solid bounded by a conical surface and a plane. The frustum of a pyramid or cone is the portion included between its base and a cutting plane parallel...
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The Elements of Geometry

George Bruce Halsted - Geometry - 1885 - 389 pages
...generated by a straight lii.e moving so as always to pass through a fixed point called the apex. 825. A Cone is a solid bounded by a conical surface and a plane. 327 827. The Frustum of a pyramid or cone is the portion included between the base and a parallel section....
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The Elements of Geometry

George Bruce Halsted - Geometry - 1886 - 394 pages
...generated by a straight line moving so as always to pass through a fixed point called the apex. 825. A Cone is a solid bounded by a conical surface and a plane. MENSURATION, OR METRICAL GEOMETRY. 827. The Frustum of a pyramid or cone is the portion included between...
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The Elements of Geometry

Webster Wells - Geometry - 1886 - 392 pages
...above and the other below the vertex. These are called the upper and lower nappes, respectively. 607. A cone is a solid bounded by a conical surface and a plane cutting all its elements. The plane is called the base of the cone, and the curved surface is called...
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The Elements of Plane and Solid Geometry ...

Edward Albert Bowser - Geometry - 1890 - 418 pages
...lying on opposite sides of the vertex, which are called the lower and upper nappes, respectively. 761. A cone is a solid bounded by a conical surface and a plane cutting all its elements. The conical surface is called the lateral surface. The base of a cone is...
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Plane and Solid Geometry

Seth Thayer Stewart - Geometry - 1891 - 426 pages
...that, by its motion, may generate the surface of the cone is, in any given position, an element. 514. A cone is a solid bounded by a conical surface, and a plane cutting all the elements. 515. The point in which all the elements meet is the vertex, or apex. 516....
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The Elements of Solid Geometry

William C. Bartol - Geometry, Solid - 1893 - 106 pages
...its vertex at 0. We shall, however, refer to only the one part, 0-ABC, as the conical surface 123. A cone is a solid bounded by a conical surface and a plane called the base passing through all the elements of the surface. The line from the vertex to the centre...
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Plane and Solid Geometry: Suggestive Method

George Clinton Shutts - Geometry - 1894 - 412 pages
...moving straight line is the generatrix. (¿>) The given curve is the directrix. SOLID GEOMETRY. 587. A cone is a solid bounded by a conical surface and a plane surface. (a) The plane is the base of the cone. (b) The conical surface is the lateral surface or the...
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Elements of Mechanical Drawing

Gardner Chace Anthony - Mechanical drawing - 1894 - 190 pages
...motion of a straight line one end of which is fixed while the other is constrained to move in a curve. A cone is a solid bounded by a conical surface and a cutting plane called the base. A circular cone is a cone whose base is a circle. A right circular cone...
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