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 138
ter and FG,FP and FT as radii. The double ordinate of the circle is also the doubleordinate of the parabola, i. e., F describes a parabolaas N moves along the axis. 240. Take any point N between O and F(Fig. 69).Fold RNP at right angles to OF. Take R so that OR = OF. Fold .ffiVperpendicular to OR,… … Fig. 69. 241. A7 and N coincide when PFP is the latusrectum. As N recedes from F to 0, N moves forward fromF to infinity. At the same time, Amoves toward O, and T(OT=ON) moves in the opposite direction toward infinity. 242. To find the area of a parabola bounded bythe axis and an ordinate. Complete…
Geometry -- Study and teaching · Paper work
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
