T. Sundara Row's geometric exercises in paper folding. Edited and rev. by Wooster Woodruff Beman and David Eugene Smith (1901)
Sundara Rao, Tandalam, 1853-, Beman, Wooster Woodruff, 1850-1922, Smith, David Eugene, 1860-1944 · Chicago Open Court Pub. Co · leaf 33
Fig. 12. 42. The a ABC= rectangle of AC and C~Y7, i. e.\ABX \V%AB = \VZ-AB? = 0.433.... X^2- 43. The angles of the triangle ACC are in theratio of 1:2:3, and its sides are in the ratio of ]/ 1: l/3 : 1/4. III. SQUARES AND RECTANGLES. 44. Fold the given square as in Fig. 13. Thisaffords the… … Fig. 13- orem. FGHbeing a right-angled triangle, the squareon FH equals the sum of the squares on FG and GH.uFA + nDB = uFC.It is easily proved that FC is a square, and that PAPER FOLDING 15 the triangles FGH, HBC, KDC, and FEK are con-gruent. If the triangles FGH and HBC are cut off fromthe…
Geometry -- Study and teaching · Paper work
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
