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 144
GEOMETRIC EXERCISES I24 250. AN'NA' is equal to the square on the ordi- nate QN of the auxiliary circle, and PN \ QN = BC.AC. 251. Fig. 71 shows how the points can be deter- mined when the constant ratio is less than unity. Thus, lay off CD = AC, the semi-major axis. Through E any point of AC draw… … the auxiliary circle in Q. Draw B'E and produce it to meet the ordinate QN in P. Then is PN: QN = B'C : Z>C=BC : AC. The same process is appli- cable when the ratio is greater than unity. When points in one quadrant are found, corresponding points in other quadrants can be easily marked. 252. If P…
Geometry · Paper work
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