T. Sundara Row's geometric exercises in paper folding. Edited and rev. by Wooster Woodruff Beman and David Eugene Smith (1901)
Sundara Rao, Tandalam, 1853-, Beman, Wooster Woodruff, 1850-1922, Smith, David Eugene, 1860-1944 · Chicago Open Court Pub. Co · leaf 136
gives also the tangent tothe curve at the point. IN PAPER FOLDING 117 236. FL which is at right angles to OX is calledthe semi-latus rectum. 237. When points on the upper half of the curvehave been obtained, corresponding points on the lowerhalf are obtained by doubling the paper on the axisand… … Fig. 68. The parabola may be denned as the curve tracedby a point which moves in one plane in such a mannerthat the square of its distance from a given straightline varies as its distance from another straight line;or the ordinate is the mean proportional between the n8 GEOMETRIC EXERCISES…
Geometry -- Study and teaching · Paper work
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
