Geometrical Conics Including Anharmonic Ratio And Projection, With Numerous Examples
The book Geometrical Conics Including Anharmonic Ratio And Projection, With Numerous Examples was written by author Charles Taylor Here you can read free online of Geometrical Conics Including Anharmonic Ratio And Projection, With Numerous Examples book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Geometrical Conics Including Anharmonic Ratio And Projection, With Numerous Examples a good or bad book?
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85. 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, E are the two points in the parabola at which this chord subtend a right angle. If RE be joined, meeting the axis in L\ then LL' wUl be equal to the latus rectum. 87. The area included between any two focal radii 8P, 8Q is equal to one-half of that included between the curve, the direct...rix, and the perpendiculars upon It from P, Q. 88. If PQ be a chord of a parabola, normal at P, and T the point in which the tangents at P, Q intersect, then PQ:PT^PN:AN, where PN is the ordinate of P. 89. Prove also that PQ .AN= iSP. 8Y. 90. If PQ, PK be chords of a parabola, PQ being normal at P, and PK equally inclined to the axis with PQ, the angle PKQ win be a right angle. 91. A parabola touches one side of a triangle in Its middle point, and the other two sides produced. Prove that the per- pendiculars drawn from the angles of the triangle upon any tangent to the parabola are in harmonical progression.
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