Perspective and geometrical drawing adapted to the use of candidates for second and third-class teachers' certificates (1887)
McGuirl, Thomas H. [from old catalog] · Toronto, W. Briggs; · leaf 119
produced; bisectthis line by KL, which will also be a tangent at point H. IfAC be produced, the line FC, perpendicular to the tangent atthe point of contact C, is called a normal. (Fig. 79.) (b) To draw a tangent to a circle from an external point.Join point D with centre; on DA as diameter… … Let AD be the given altitude; at A and D draw perpen-diculars, and with A as centre and any distance describe anarc EF; with D as centre and any distance less than DAdescribe an arc to cut arc in E and F; join AE and AF, andproduce them to base, forming isosceles triangle ABC. (Fig.80.) JSo, IS,—To…
Geometrical drawing · Perspective
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