Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 27
Fig. 24. Fig. 25. cutting the circle at E and F. Draw A E and A F, and they will be the tan-gents required. To construct within the sides of an angle a circle tangent to these sides at agiven distance from the vertex (Fig. 27).
Mechanical drawing
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