T. Sundara Row's Geometric exercises in paper folding (1905)
Sundara Rao, T. (Tandalam), b. 1853, Beman, Wooster Woodruff, 1850-1922, Smith, David Eugene, 1860-1944 · Chicago : Open Court · leaf 30
io GEOMETRIC EXERCISES are on each side of it. We thus get isosceles triangles standing on a side of the square. 23. The middle line divides the isosceles triangle into two congruent right-angled triangles. 24. The vertical angle is bisected. 25. If we so take the point on the middle line, that … Fig. 10. its distances from two corners of the square are equal to a side of it, we shall obtain an equilateral triangle (Fig. 10). This point is easily determined by turning the base AB through one end of it, over A A', until the other end, B, rests upon the middle line, as at C. 26. Fold the…
Geometry · Paper work
Internet Archive · Wellesley College Library · Public domain (published before 1931). Free to use for anything.
