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 55
Fig. 29. Fold through the mid-points of the opposite sides,and obtain the lines A OB and COD. On both sides of AO and OB describe equilateraltriangles (§ 25), AOE, AHO; BFO and BOG. 36 GEOMETRIC EXERCISES Draw EF and HG. AHGBFE is a regular hexagon. It is unnecessary to give the proof. The greatest… … Fig. 30. 81. If R be the radius of the circumscribed circle, 1 R= 0 AB. 82. If r be the radius of the inscribed circle,r=] - -^^ = 0.433.. ..XAB. -A IN PAPER FOLDING 37 83. The area of the hexagon is 6 times the area ofthe triangle HGO, „ AB i/3 4 43l/3 AB. 8 ^^2 = 0.6495.. ..XAB*. Also the hexagon…
Geometry -- Study and teaching · Paper work
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
