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 48
oui-th Proportional to Three given Lines, A, B, and C.—In this pjcohlem the fourth term, X, in the proportionA : B : : C : X, is to be found. Take, as in the previous problem, any indefinite line, IP (Fig. 84), and at 1 draw 10 at any angle with IP. From 1 onIP cut off a length 1 2 equal to A, and…
Mechanical drawing · Geometrical drawing
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