Analytic geometry, for technical schools and colleges (1897)
Lambert, Preston Albert, 1862-1925 · New York, Macmillan · leaf 142
is instrument is called the elliptic Art. 66. — Area of the Ellipse Erect any number of perpendiculars to the major diameterof the ellipse, and beginniug at the right draw through thepoints of intersection of theseperpendiculars with the ellipseand the circumscribed circleparallels to the minor… … 128 ANAL YTIC GEOMETR Y Hence the sum of the areas of the rectangles inscribed inthe ellipse bears to the sum of the rectangles inscribed in thecircle the ratio of h to a. By indefinitely increasing thenumber of rectangles, the sum of the areas of the rectanglesinscribed in the ellipse approaches…
Geometry, Analytic
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