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 35
i6 GEOMETRIC EXERCISES nABCD = (a+b)2. Now square ABCD overlaps the square KLMN by the four triangles AKN, BLK, CML, and DNM. But these four triangles are together equal to two of the rectangles, i. e., to lab. Therefore {a + bf — a2 + b2 + 2ab. 46. EF=a — b, anda£jF'GIf=(a — b)2. The square EFGH… … Fig-15 47. The square ABCD overlaps the square EFGH by the four rectangles AF, BG, CH, and DE. ... {a+Vf — {a—bf = ±ab. 48. In Fig. 15, the square ABCD = (a-\-bf, and
Geometry · Paper work
Internet Archive · Cornell University Library · Public domain (published before 1931). Free to use for anything.
