Geometrical drawing, projection drawing, freehand and ornamental drawing, wash work and brush drawing, elementary perspective drawing, architectural drawing (1921)
International Correspondence Schools · Scranton, PA : International Textbook Co. · leaf 24
right hand and then proceed as before. 11. A line may be drawn at right angles to another linewhich is neither vertical nor horizontal, as illustrated inFig. 23. Let c d ho. the given line (-shown at the left-handside). Place one of the shorter edges, as ab, of thetriangle B so that it will… … Fig. 23 B along the edge of A with the right hand, when thelines h /, m n, etc. may be drawn perpendicular to c d alongthe edge d / oi the triangle B. The dotted lines show theposition of the triangle B when moved along the edge of A. 12. The right-hand portion of Fig. 23 shows anothermethod of…
