Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 82
. Prob. XLYI.—To inscribe a circle within a regular polygon. When the polygon has an even number of sides, as in fig. 139, bisecttwo opposite sides at A and B, draw A B, and bisect it at C by a diagonalD E drawn between opposite angles; with the radius C A describe thecircle as required. When the…
