The mechanical engineer's pocket-book. A reference-book of rules, tables, data, and formulæ, for the use of engineers, mechanics, and students (1910)
Kent, William, 1851-1918 · New York, J. Wiley & sons · leaf 88
Hequal to D E, and draw F H. Theangle F is equal to A, as required. 9. To draw angles of 60° and 80° (Fig. 9). — From F, with anyradius F I, describe an arc / H; andfrom /, with the same radius, cutthe arc at H and draw F H to formthe required angle I F H. Draw theperpendicular H K to the base line… … 40 GEOMETRICAL PROBLEMS.
Mechanical engineering
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