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" For example, the locus of a point which moves in such a way that its distance from a fixed point is always equal to its distance from a fixed straight line, is a parabola. "
Elements of analytic geometry - Página 169
de Simon Newcomb - 1885 - 356 páginas
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Winston's Cumulative ... Encyclopedia: A Comprehensive Reference Book, Volume 7

1918 - 566 páginas
...parallel to a slant side, the section is a parabola. It may also be defined as the curve traced out by a point which moves in such a way that its distance from a fixed point, called the ' focus/ is always equal to its perpendicular distance from a fixed straight i » с с...
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Mathematics for Engineers, Volume 1

William Neville Rose - 1920 - 542 páginas
...when AB = -025* and CD = -027*. 025 *l f B Fig. 33. — Gauge Hob. The Ellipse. — The ellipse is the locus of a point which moves in such a way that the sum of its distances from two fixed points, called the foci is constant. This constant length is...
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Winston's Cumulative Loose-leaf Encyclopedia: A Comprehensive ..., Volume 7

Charles Morris - 1921 - 672 páginas
...parallel to a slant side, the section i* a parabola. It may also be defined as the curve traced out by a point which moves in such a way that its distance from a fixed point, called the ' focus, is always equal to its perpendicular distance from a fixed straight line, called...
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Analytic Geometry

Arthur McCracken Harding, George Walker Mullins - 1924 - 340 páginas
...b2 213)(p. 216). Since this ratio is constant in each case, we are led to the following definition : The locus of a point which moves in such a way that the ratio of its distance from a given point to its distance from a given line is constant is called...
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Introductory Mathematics

Joseph Eugene Rowe - 1927 - 304 páginas
...as subject to further tests if accurate results are required. In plane geometry a circle was defined as the locus of a point which moves in such a way that it is always the same distance from a point within called the center. By the use of (3) the equation...
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Mathematics for Engineers ...

William Neville Rose - 1928 - 552 páginas
...*. e., find x when AB = -025* and CD = -027*. Fig. 33.— Gauge Hob. The Ellipse. — The ellipse is the locus of a point which moves in such a way that the sum of its distances from two fixed points, called the foci is constant. This constant length is...
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McA: Entrance Examination

J.V. Subrahmanyan - 2004 - 1128 páginas
...imaginary if с is -ve. THE PARABOLA 1. Definition Given a fixed line and a fixed point, a conic is defined as the locus of a point which moves in such a way that its distance from the fixed point bears a constant ratio to its perpendicular distance from the fixed line. The fixed...
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Further Pure Mathematics, Volume 2

Geoff Mannall, Michael Kenwood - 2005 - 162 páginas
...The focus-directrix property of the hyperbola A hyperbola is often defined as the locus of a point P which moves in such a way that its distance from a fixed point S (the focus) is in a constant ratio e, where e > 1, to its distance from a fixed line (the directrix)....
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Definitions and Formulae in Mathematics IX & X

Ravi Kumar - 2006 - 152 páginas
...called a circle with centre O and radius = r units. The circle is denoted by C(O, r). It is also defined as the locus of a point which moves in such a way that its distance from fixed point O remains constant at r units. The fixed point O is called the centre and constant distance...
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Definitions and Formulae in Mathematics

116 páginas
...point O is called the centre and constant distance r units is called its radius. It is also defined as the locus of a point which moves in such a way that its distance from fixed point O remains constant at r units. The fixed point O is called the centre and constant distance...
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