T. Sundara Row's Geometric exercises in paper folding; (1901)
Sundara Rao, T. (Tandalam), b. 1853 · Chicago, The Open court pub. company; [etc., etc.] · leaf 136
IN PAPER FOLDING 117 236. FL which is at right angles to OX is called the semi-latus rectum. 237. When points on the upper half of the curve have been obtained, corresponding points on the lower half are obtained by doubling the paper on the axis and pricking through them. 238. When the axis and… … Fig. 68. The parabola may be denned as the curve traced by a point which moves in one plane in such a manner that the square of its distance from a given straight line varies as its distance from another straight line; or the ordinate is the mean proportional between the
Geometry -- Study and teaching · Paper work
Internet Archive · University of California Libraries · Public domain (published before 1931). Free to use for anything.
![An illustration from Works. Popular edition.] 2 series (1886)](https://img.insideoutlibrary.com/img/200/bl-bl_003191336_9-349-1.webp)
