A Treatise on the Analytical Geometry of the Point, Line, Circle, and Conic Sections: Containing an Account of Its Most Recent Extensions, with Numerous Examples

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Hodges, Figgis, & Company Limited, 1893 - 564 páginas
 

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Página 179 - The locus of the middle points of a system of parallel chords in a parabola is called a diameter.
Página 309 - We learn that the locus of a point, such that the tangent from it to a fixed circle is in a constant ratio to its distance from a fixed line...
Página 179 - The area of the triangle formed by three tangents to a parabola is equal to half the area of the triangle formed by joining the points of contact. 86. PQ is any chord of a parabola cutting the axis in L; R, R' are the two points in the parabola at which this chord subtend a right angle. If RR be joined, meeting the axis in L', then LL...
Página 91 - Find the locus of a point the sum of whose distances from two given straight lines is equal to a given constant le.
Página ii - A TREATISE ON THE ANALYTICAL GEOMETRY OF THE POINT, LINE, CIRCLE, & CONIC SECTIONS, Containing an Account of its most recent Extensions. With numerous Exercises.
Página iii - CASEY.— A TREATISE ON THE ANALYTICAL GEOMETRY OF THE POINT, LINE, CIRCLE, AND CONIC SECTIONS.
Página 34 - A line which divides two sides of a triangle proportionally is parallel to the third side.
Página 326 - If the three pairs of opposite sides of a hexagon inscribed in a conic section be produced to meet, the three points of...
Página 188 - The locus of the intersection of tangents to a circle, at the extremities of a chord which passes through a given point, is , B . . __E_ the polar of the point.
Página 251 - To find the locus of the centre of a circle which passes through a given point and touches a given straight line.

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