American text books of art education : Geometrical drawing (1873)
Smith, Walter, 1836-1886 · Boston : James R. Osgood & Co. · leaf 32
ch as possible at right angles: thus X (Fig.i.) not thus The point of intersection in Fig. 1 is more distinctly2, and the work depending on it will be likely, therefore arked than in Fig.o be more accurate. Prob. 9. — To trisect a right angle ABC. Construct the ri^ht angle first by Prob. 5. With B… … Prob. 10. — Through a point C to draw a line parallel to a givenline A B. Take any point, 1, in A B as centre, and with 1 C as radius, de-scribe an arc to cut A B in 2 ; with centre C, same radius, describea similar arc from 1, and make 1 3 equal to 2 0. Draw a linethrough 3 C, which will be the…
Geometrical drawing
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