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 113
Let BAC be a given angle; with centre A and any distanceAB describe an arc BC; with centre B and any distance lessthan half of BC describe an arc; with centre C, and same dis-tance, describe an arc to cut former arc in D; join AD, whichwill bisect the angle. (Fig. 74.) No. 7.- -To trisect a right… … Let ABC be the given right angle; with B as centre andat any distance BA describe the quadrant AC; with centre Aand distance equal to AB describe an arc to cut AC in E; andwith centre C, and distance equal to CB or BA describe an GEOMETRICAL DRAWING. Ill arc to cut arc in D. Then D, E will be…
Geometrical drawing · Perspective
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