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 63
iven line AB, to construct a regular octagon. At A and B erect the perpendiculars AC and BD.Produce AB to E. Bisect theangle DBE by the line BE.Make BE equal to AB. EromE draw the line EH parallelto AB, and make KH equal toLE. Join AH. Set off on ACand BD, from points A and B,a length equal to HE,… … Fig. 105. POLYGONS 43 Problem 47.In a given circle to inscribe a nonagon. Draw the diameters AB and CD perpendicular to each other. With A as Acentre, and radius AE, draw the arc cuttingthe circle in F. With Bas centre, and radius BF,draw the arc cuttingCD produced in Gr.With Gr as centre,…
Geometrical drawing
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