T. Sundara Row's Geometric exercises in paper folding; (1901)
Sundara Rao, Tandalam, 1853-, Beman, Wooster Woodruff, 1850-1922. ed, Smith, David Eugene, 1860-1944. ed · Chicago, The Open Court Pub. Company; [etc., etc.] · leaf 112
IN PAPER FOLDING. 93 Then the polygon A'B'C'D" will be similar to ABCD.. .. The polygons so described around a com- mon point are in perspective. The point O may also lie outside the polygon. It is called the center of per- spective. 172. To divide a given line into 2, 3, 4, 5.... equal parts. Let… … at right angles to AB on opposite sides and make AC=BD. Draw CD cutting AB in Ft. Then AFt = F2B. Now produce AC and take C£ = EF=FG.. .. = AC or BD. Draw DE, DF, DG cutting AB in Fa, Ft, F6,.... Then from similar triangles, PSB:AP3 = BD:A£.
Geometry · Paper work
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
