Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 30
Let C be the required point of bisection.Draw the ordinates and lis as in figure.Now AC = CB [by construction]. .-. AE = CD, EC = DB. • m Jb iXi —— vbn JO • o • y -yi = yi-y - • • * The beginner should prove the generality of these formulae. (1) (2) 14 ANALYTICAL GEOMETRY Then from (1) and (2) 2r =…
Geometry, Analytic
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