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 133
Fig. 102. Let AC and BC be the given lines; place them in astraight line AB; bisect AB in D, and on AB describe 130 DRAWING. semicircle AEB; through C draw CE at right angles to AB;then will AC : CE : : CE : CB. (Fig. 102.)(b) To draw a third proportional (greater). ^ … Fig 103 Let AB and BC be the given lines; draw AE greater thanAC, making any angle with AC ; make AD = BC ; join BD,and through C draw CE parallel to BD ; then will AB : BC : :BC:DE. (Fig. 103.) (c) (Less). Make AE greater than BC and less than AC.
Geometrical drawing · Perspective
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