The carpenter's and joiner's hand-book : containing a complete treatise on framing hip and valley roofs ... (1888)
Holly, H. W. (Henry Wells) · New York : John Wiley & Sons · leaf 37
; describe the circle cutting the outside lineat c and 6?; repeat the same at each corner,and draw lines c f h and ij. Theselines will form the octagon desired 25, To draw a hexagon or six-sided Jtg-nre on a circle. Each side of a hexao^on drawn within acircle is just half the diameter of that… … Fig. 22. &C.5 and you tiave an exact hexagon. JoinJ, andy, and yon have an equilateral tri-angle ; join and the centre, ^nd youhave another triangle, just one-sixth of thehexagon described. 26. To describe a curve hy a set triangle.
Carpentry
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-319-211.webp)
