Perspective and geometrical drawing : adapted to the use of candidates for second and third-class teachers' certificates (1887)
McGuirl, Thos. H. (Thomas H.) · Toronto, Ont. : W. Briggs · leaf 108
45c with P.P. (c) When opened perpendicularly to P.P. GEOMETRICAL DRAWING. 105 GEOMETRICAL DRAWING. To construct the following figures, pupils should providethemselves with a pair of good compasses with pen attach-ment, and a ruler, with marks for inches and fractions of aninch. No proof is… … Fig. 64. Fig. 63. Let AB be the given line, and let B be a point at whichthe perpendicular to AB is to be drawn. In first, take anypoint C above, and with distance CB describe circle, cuttingAB in E; join EC and produce to meet circumference in D;join DB, which will be the perpendicular required.…
Geometrical drawing · Perspective
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