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 125
ns of their extrem-ities towards the same parts form a trapezoid whichhas an axis of symmetry, viz., the diameter perpen-dicular to the parallel chords. The diagonals of thetrapezoid intersect on the diameter. It is evident byfolding that the angles between each of the parallelchords and each… … Fig. 61. Fig. 62 An inscribed angle equals half the central anglestanding on the same arc. GivenAVB an inscribed angle, and A OB the central angleon the same arc AB.To prove that / A VB = \ Z A OB.Proof.1. Suppose VO drawn through center O, and pro-duced to meet the circumference at X. IN PAPER…
Geometry -- Study and teaching · Paper work
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
