Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 44
e dodecagon may be formed by bisecting the sides of the hexagon. Each side of a regular hexagon is exactly equal to the radiusof the circle that circumscribes the figure. For the radius isequal to a chord of an arc of 60 degrees ; and, as every circle issupposed to be divided into 350 degrees,… … Fig. 55. 30 AMERICAN HOUSE-CARPENTER. 94.— Within a square to inscribe an octagon. Let abed,{Fig. 55j) be the given square. Draw the diagonals, a d andbe; upon a, 6, c and d, with a e for radius, describe arcs cut-ting the sides of the square at 1, 2, 3, 4, 5, 6, 7 and 8; join 1and 2, 3 and 4, 5…
Carpentry · Architecture
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