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 28
er of the squaredivides it into two trapezoids which are congruent. Asecond crease through the center at right angles tothe first divides the square into four congruent quadri-laterals, of which two opposite angles are right angles.The quadrilaterals are concyclic, i. e., the vertices ofeach lie in… … Fig. 9. the mid-points of the remaining sides and is at rightangles to those sides. Take any point on this line,fold through it and the two corners of the square which IO GEOMETRIC EXERCISES are on each side of it. We thus get isosceles trianglesstanding on a side of the square. 23. The middle line…
Geometry -- Study and teaching · Paper work
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
