. 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. sect the base AB of the triangle at D and erect the per-pendiculars DE and BF at D and B. Through C drawthe line EOF intersecting the perpendiculars DE and BFat E and F. Then BDEF is the require
. 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. sect the base AB of the triangle at D and erect the per-pendiculars DE and BF at D and B. Through C drawthe line EOF intersecting the perpendiculars DE and BFat E and F. Then BDEF is the required rectangle. PRACTICAL GEOMETRY AND MENSURATION 47& To construct a triangle equal in area to a given par-allelogram.—Figure 41. Let ABCD be the given par-allelogram: Produce the line AB at B and make BE
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