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 116
Let BACD be a circle or arc; draw any two chords AB,CD, and draw arcs EF and GH, bisecting the chords, respec-tively; join EF and HC and produce them to meet in K;then K will be the centre, and if K and D be joined,. KDwill be a radius, and a circle may be thus described with itwith the centre thus… … Fig. 79. Let C be a given point in the circumference; let A be thecentre; join CA; at C erect the perpendicular CF, which willbe tangent required. Also if H be the given point, join AHand produce it, making HG equal to part produced ; bisectthis line by KL, which will also be a tangent at point H.…
Geometrical drawing · Perspective
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