Industrial drawing and geometry; an introduction to various branches of technical drawing (1911)
Spooner, Henry John, 1856- · London, New York [etc.] Longmans, Green, and co. · leaf 52
ixed point in the circle. Join B to the centre A, and Ithiough B draw CD perpendicular to AB. Then CD is „the tangent required. 70. To draw a Tangent to a Circle through afixed Point without it.—Let the circle in Fig. 91 be thegiven one, and P the j)oint. Join the centre A with P,the fixed point… … C 13 Fig. 91.—Tangents to a circle. F A Fig. 92.—Circle touching two Fgiven lines. It is evident that in a similar way a tangent the other side of PA could have been drawn. Notes.—1. You will notice that if P be joined with A, the angle PFA wUl be a right angle, being an angle in a semicircle.…
Mechanical drawing · Geometrical drawing
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