Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 60
raAvn through the second division from A. POLYGONS 39 Peoblem 39. To inscribe any regular polygon in a given circle (secondmethod). For example, a nonagon. Describe a circle, and drawthe radius CA. At A draw a tan-gent to the circle. With A ascentre, and with any radius, drawa semicircle, and… … Join these points, which will Peoblem 40. 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, and divide itinto as many equal divisions asthere are sides to the polygon (inthis instance seven). Join A…
Geometrical drawing
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