# Analytic Geometry

Ginn, 1922 - Geometry, Analytic - 290 pages
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### Contents

 CHAPTER PAGE I INTRODUCTION 1 GEOMETRIC MAGNITUDES 15 LOCI AND THEIR EQUATIONS 33 THE STRAIGHT LINE 59 THE CIRCLE 91 TRANSFORMATION OF COORDINATES 109 THE PARABOLA 115 THE ELLIPSE 139
 CONICS IN GENERAL 193 POLAR COORDINATES 209 HIGHER PLANE CURVES 217 POINT PLANE AND LINE 237 SURFACES 265 SUPPLEMENT 283 NOTE ON THE HISTORY OF ANALYTIC GEOMETRY 287 INDEX 289

### Popular passages

Page 38 - A conic section is the locus of a point which moves so that its distance from a fixed point, called the focus, is in a constant ratio to its distance from a fixed straight line, called the directrix.
Page 106 - A point moves so that the sum of the squares of its distances from the four sides of a square is constant.
Page 32 - Prove that the middle point of the hypotenuse of a right triangle is equidistant from the three vertices.
Page 115 - F') ; the diameter drawn through them is called the major axis, and the perpendicular bisector of this diameter the minor axis. It is also defined as the locus of a point which moves so that the ratio of its distance from a fixed point...
Page 223 - The cycloid is a plane curve formed by a point on a circle as the circle rolls along a straight line.
Page 145 - Show that the locus of a point which moves so that the sum of its distances from two h'xed straight lines is constant is a straight line.
Page 106 - Find the equation of the circle inscribed in the triangle formed by the lines x + y = 0, x - 7y + 24 = 0, and 7x - y -8 = 0.
Page 138 - Prove that the ordinate of the point of intersection of two tangents to a parabola is the arithmetical mean between the ordinates of the points of contact of the tangents.
Page 87 - Find the equations of the bisectors of the angles formed by the lines ox - 12 y+ 10 = 0 and 12x - by + 15 = 0.
Page 240 - POx{ , are called the direction angles of the line, and their cosines are called direction cosines.