 | Isaac Wilber Jackson - Conic sections - 1845 - 116 pages
...by the straight lines MN, MN' drawn from M parallel to Z'Y' and ZY, is the conjugate to MM'. VIII. An ordinate to a diameter, is a straight line drawn from any point of the curve, to meet the diameter produced, parallel to the tangent at its extremity. The parts of... | |
 | Elias Loomis - Conic sections - 1849 - 252 pages
...V. 5. A tangent is a' straight line which meets the curve, but, being produced,does not cut it. 6. An ordinate to a diameter, is a straight line drawn from any point of the curve to meet that diameter, and is parallel to the tangent at its vertex. Thus, let AC be a... | |
 | Conic sections - 1850 - 118 pages
...by the straight lines MN? MN' drawn from M parallel to Z'Y' and ZY, is the conjugate to MM'. VIII. An ordinate to a diameter, is a straight line drawn from any point of the curve, parallel to the tangent at the extremity of that diameter, and terminating in the diameter... | |
 | Charles Davies, William Guy Peck - Mathematics - 1857 - 608 pages
...point ; the point is called the pole of the line. The directrix is the polar line of the focus. 9. An ordinate to a diameter is a straight line drawn from any point of the diameter to the curve, and parallel to the conjugate of the diameter. The ordinates to the axes... | |
 | Elias Loomis - Conic sections - 1858 - 256 pages
...axis. 9. A tangent is a stiaight line which meets the curve, but, Oeing produced, does not cut it. 10. An ordinate to a diameter, is a straight line drawn from any point of the curve to the diameter, parallel to the tangent at one of its vertices. Thus, let DD' be any... | |
 | Horatio Nelson Robinson - Conic sections - 1862 - 356 pages
...distance from the focus to the directrix, and all the diameters of the parabola are parallel lines. 6. An Ordinate to a diameter is a straight line drawn from any point of the curve to the diameter, parallel to the CONIC SECTIONS. tangent line through its vertex. Thus,... | |
 | Horatio Nelson Robinson - Conic sections - 1863 - 362 pages
...not cut it. 10. A Normal to a curve at any point is a perpendicular to the tangent at that point. 11. An Ordinate to a Diameter is a straight line drawn from any point of the curve to the diameter, parallel to a tangent passing through one of the vertices of that diameter.... | |
 | Elias Loomis - Geometry - 1871 - 302 pages
...5. A tangent is a straight line which •neets the curve, but, being produced, does not cut it. C 6. An ordinate to a diameter, is a straight line drawn from any point of the curve to meet that diameter, and is parallel to the tangent at its vertex. Thus, let AC be a... | |
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An ordinate to a diameter, is a straight line drawn from any point of the curve to meet that diameter, and is parallel to the tangent at its vertex. 