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 164
B+ /_CBO= £ACB+ / ODB= LACB-\-2/_ACB= 3lACB. THE LEMNISCATE OF BERNOULLI. 279. The polar equation to the curve is r2 = a?cos2d.Let O be the origin, and OA=a.Produce AO, and draw OD at right angles to OATake the angle A OP =6 and A OB = 26.Draw AB perpendicular to OB.In AO produced take OC=OB. IN… … Fig. 86. It is the inverse of the rectangular hyperbola, withreference to its center as center of inversion, and alsoits pedal with respect to the center. The area of the curve is a2. THE CYCLOID. 280. The cycloid is the path described by a pointon the circumference of a circle which is supposed…
Geometry -- Study and teaching · Paper work
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
