T. Sundara Row's Geometric exercises in paper folding (1905)
Sundara Rao, T. (Tandalam), b. 1853, Beman, Wooster Woodruff, 1850-1922, Smith, David Eugene, 1860-1944 · Chicago : Open Court · leaf 108
lograms have a center of symmetry. A quadrilateral of the form of a kite, or a trapezium with two opposite sides equal and equally inclined to either of the remaining sides, has an axis of sym- metry. 163. The position of a point in a plane is also de- termined by its distance from a fixed point… … Fig. 55- O is called the pole, OA the prime-vector, OP the radius vector, and l_AOP the vectorial angle. OP and /_AOP are called polar co-ordinates of P. 164. The image of a figure symmetric to the axis OA may be obtained by folding through the axis OA. The radii vectores of corresponding points…
Geometry · Paper work
Internet Archive · Wellesley College Library · Public domain (published before 1931). Free to use for anything.
