Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 137
D as centre, draw a circlewith a radius equal to C4. In-scribe a square in this circle(Prob. 56), and bisect each ofits sides in the points i, 2, 3,and 4 (Prob. i). Join thesepoints, and draw diagonals.Divide each semi-diagonal intothree equal parts and join them(Prob. 9), thus making threecomplete… … L as radius, as shown by EXERCISES. 1. Construct an ellipse: major axis 3.75, minor axis 2.25. Selectany point in the curve, and draw a tangent to it. 2. Construct an ellipse ; the foci to be 2^ apart, and the transversediameter 3f. 3. Draw a rectangle 3.25 x 2.3, and inscribe an ellipse within it.…
Geometrical drawing · Design · Drawing
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