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 165
is equalto the circumference of the circle. The circumference of a circle may be obtained inlength in this way. Wrap a strip of paper round acircular object, e. g., the cylinder in Kindergartengift No. II., and mark off two coincident points. Un-fold the paper and fold through the points. Then… … Bisect AA in D and draw DB at right angles toAA, and equal to the diameter of the generatingcircle. Then A, A and B are points on the curve. Find O the middle point of BD. Fold a number of radii of the generating circlethrough O dividing the semi-circumference to theright into equal arcs, say,…
Geometry -- Study and teaching · Paper work
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
