The American house-carpenter; a treatise on the art of building, and the strength of materials (1867)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 47
Fig. 55. scribe the arc, cfdj join a and c, c and d^ d and J / tlien a cd h will be the square required. … 95.— Within a given circle^ to inscribe cm equirlateral tri-angle^ hexagon or dodecagon. Let a h c d, {Fig. 56,) be thegiven circle. Draw the diameter, h d; upon J, with theradius of the given circle, describe the arc, a e c j join a andc, also a and d^ and c and d—and the triangle is completed.For…
Carpentry · Architecture
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