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 124
case)into six equal parts. Take centre O, and join any two, as OA,OB; bisect the angle AOB by OE, and at E draw a tangentCD ; produce OA and OB to meet the tangent in C and D. GEOMETRICAL DRAWING. 119 Bisect the angles at C and D by CF and DF, meeting at F;then with centre O and distance OF… … D A B C Fig. 88. Let AB be the given line, produce it both ways; then with,centre A and distance AB, describe the semicircle DEB,describe also a similar semicircle AFC. Divide the circumfer-ence DEB into as many equal parts as the polygon is to havesides (in tliis case live), and join A with the…
Geometrical drawing · Perspective
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