Babbitt, Arthur B. (Arthur Bradford), b. 1873 · New York, H. Holt and company · leaf 197
To construct an equilateraltriangle on a given base,—The line A B is the givenbase. With A as a center,draw arc 1 through B.With B as a center, drawarc 2 through A and inter-secting arc 1 at C. LinesC A and C B complete thetriangle. PROBLEM 12 … To construct an isoscelestriangle on a given base,having given the length of theequal sides—The line A B isthe given base and C D isthe length of the equalsides. With the ends ofthe line A B as centers anda radius equal to the lengthof the line C D, draw arcsintersecting at E. Thelines A E and B E…
Mechanical drawing
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