Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 40
d ruler,and may be used in solving the following problems: The area of a figure is thequantity of space inclosed by itslines. Construct a right angle (Fig.80). Divide the base and theperpendicular by dividers intoany number of equal spaces; forinstance, ten on the one and fiveon the other.… … 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
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
