Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 68
Fig. 116. 54 GEOMETRICAL DRAWING AND DESIGN. 79. To construct a foiled figure about any regular polygon, havingadjacent diameters. For example, a pentagon. Tlie Cinquefoil. — Bisecteach side of the pentagonin the points C, D, E, F, andG. With each of these pointsas centres, and with a radiusequal… … In a given equilateral triangle ABC, to inscribe a trefoil. The Trefoil. — Bisect theangles CAB and ABC bylines produced till they meetin L, and the sides of thetriangle in D and E. FromC, through centre L, draw theline CF. Join DE, EF, andFD. From G draw GI per-pendicular to AC. WithG,H,and K as…
Geometrical drawing · Design · Drawing
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