. 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 38. Q B Figure 39. GF and DE perpendicular to GD. Then EFGD is therequired rectangle. To construct a rectangle equal in area to a given tri-angle.—Figure 40. Let ABC be the given triangle: Bi- E C_F

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Keywords: ., bookcentury1900, bookdecade1910, bookidsheetmetalwo, bookyear1918