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 158
B is equal to A VE but lieson the opposite side of AB. The length from A to Eis half a wave length, which will be repeated from E PAPER FOLDING 139 to B on the other side of AB. E is a point of inflec-tion on the curve, the radius of curvature there be- coming infinite. THE OVALS OF CASSINI. 272.… … Fig. 82. the curve is rr = >£2, where r and r are the distancesof any point on the curve from the foci and k is a con-stant. Let F and F be the foci. Fold through F andF. Bisect FF in C, and fold BCB perpendicular toFF. Find points B and B such that FB and FBare each =k. Then B and B are…
Geometry -- Study and teaching · Paper work
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
