Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 34
Fig. 41. trisect the angle ABC. GEOMETRICAL DRAWING AND DESIGN. Triangrles. … D 15. To construct an equilateraltriangle on a given line AB. From A and B as centres, andwith AB as radius, describe arcscutting each other at C ; join Cwith A and B. Then ABC willbe an equilateral triangle. 16. On a given base AB to con-struct an isosceles triangle,the angle at vertex to be…
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
