Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 41
Fig. 80. 24 CONSTRUCTION OF GEOMETRICAL PROBLEMS. measure in squares will be the divisions ten in the base, multiplied by the fivein the perpendicular. If the division were inches, then the area of- this rec-tangle would be fifty square inches; iffeet, then fifty square feet. If there … B
Mechanical drawing
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