Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 124
oints for the other half in the same manner, and draw a fair curve through the points obtained, which will be the required ellipse. D Figr. 221. 158. To find the normal and tangent to a given ellipse ABCD, at agiven point P. With C as centre, andradius equal to EA, drawthe arc FH, which willgive… … CONIC SECTIONS. Ill 159. To complete an ellipse from an elliptical curve.Let AB be the given curve. Draw any two sets of parallel Join the points of bisection
Geometrical drawing · Design · Drawing
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