Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 47
mple, a nonagon. Describe a circle, and draw the radius CA. At A draw atangent to the circle. WithA as centre, and with anyradius, draw a semicircle, anddivide it into as many equalparts as there are sides tothe polygon (in this instancenine). From point A draw linesthrough each of these… … 34 GEOMETRICAL DRAWING AND DESIGN. 41. On a given line AB, to describe a regular polygon;for example, a heptagon. Produce AB to C. With A as centre, and AB as radius, describe a semicircle, anddivide it into as many equaldivisions as there are sides tothe polygon (in this instanceseven). Join A…
Geometrical drawing · Design · Drawing
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