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 37
riangle together equal 180°, each angle wiU equal one-third of180°, equal 60°. So you may use your 60° set-square to draw the two sides. 40. To construct a Triangle upon a given Sase (say 2V), the Angles being ina given Proportion (say 1:2: 3).—Draw the base AB 2^ long (Fig. 63), and with Aas… … Fig. 61.—Scalene triangle. Fig. 62.—Equilateral triangle,the centre A, and from B draw a line parallel to A5 till it intersects A2 in C NoTB.—The line on which the triangle stands is usually called the base, but for geometrical purposes any side may be considered as such. 18 CONSTRUCTION OF…
Mechanical drawing · Geometrical drawing
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