Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 49
nd a construct an arc of a circle.Connect a and h with a chord, bisect it with a perpendicular; where this per-pendicular intersects a Sat c is the centre of thearc a h. Connect h and c; d,the intersection oihc withA B, will be the centre ofthe arc h A. Arcs througha V and B can be con-structed in… … CONSTRUCTION OF GEOMETRICAL PROBLEMS. 33 TJ K From the given point T draw straight lines to the foci, F, F ; produce F Tbeyond the curve to c, and bisect the exterior angle c T F by the line T d.This line T d is the tangentrequired. To draiu a tangent to anellipse from a given pointwithout the…
Mechanical drawing
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