Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 31
Fig. 43. Fig, 44. a line from each extremity of the base to this point of intersection, and thefigure is an isosceles triangle. To construct an equilateral triangle (Fig. 43). Draw a base line, and from each extremity as a centre, with a radius equal CONSTRUCTION OF GEOMETRICxiL PROBLEMS, 15 to the…
Mechanical drawing
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