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 152
GEOMETRIC EXERCISES 132 CD:CF=OC: CD .'. OC:CD = CD:CF=CF:CE . • . CD and CF are the two geometric means be- tween OC and CE. I … Fig. 76. 264. The cissoid was invented by Diocles (second century B. C.) to find two geometric means between two lines in the manner described above. OC and CE being given, the point P was determined by the aid of the curve, and hence the point D. 265. If PD and DR are each equal to OQ, then the…
Geometry · Paper work
Internet Archive · Wellesley College Library · Public domain (published before 1931). Free to use for anything.
