Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 27
quired. 2d Method (Fig. 25).—From the given point A set off equal arcs, A B and A D. Join B and D.Through A draw A E parallel to B D, and it will be the tangent required.This method is useful when the centre is inaccessible. tangent re- FiG. 23. 10 COIs^STRUCTION OF GEOMETRICAL PROBLEMS. To draw…
Mechanical drawing
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