. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . Figure 22. Figure 23. ing the right angle, which side remains fixed—Figure 23. The axis of a cone is that side of the triangle containingthe right angle which remains fixed. The base of the cone is the circle described by that sideof the triangle containing the right-angle which revolves. If a cone be cut obliquely so as to preserve the baseentirely, the section is an ellipse. When a cone is cut by
. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . Figure 22. Figure 23. ing the right angle, which side remains fixed—Figure 23. The axis of a cone is that side of the triangle containingthe right angle which remains fixed. The base of the cone is the circle described by that sideof the triangle containing the right-angle which revolves. If a cone be cut obliquely so as to preserve the baseentirely, the section is an ellipse. When a cone is cut by a plane parallel to one of thesloping sides, the section is a parabola; if cut at rightangles to its base, a hyperbola. 472 SHEET METAL WORKERS MANUAL CONSTRUCTION OF ANGLES To bisect a given angle.—Let DAC be the given center A and any radius AE describe an arc cuttingAC and AD at E and G. With the same radius and cen-ters E and G, describe arcs intersecting at H, and joinAH. The angle DAC is bisected—Figure
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Keywords: ., bookcentury1900, bookdecade1910, bookidsheetmetalwo, bookyear1918
