Recreations in science and natural philosophy (1844)
Ozanam, Jacques, 1640-1717. n 93006101, Montucla, Jean Etienne, 1725-1799. n 85800222, Hutton, Charles, 1737-1823. n 84160398, Riddle, Edward, 1788-1854. no2004015425 · London : Thomas Tegg · leaf 196
which will each be the greatest inscript- ible in the given triangle, and both equal. When the triangle has all its angles acute, the solution will be different according to the side assumed as base. There will conse¬ quently be three, and each will give a table more or less elongated, and always… … semi-axis of the ellipsis; and we have already shewn in what manner an ellipsis may be described when the two axes are given. But if the angle lgp be acute or obtuse, the ellipsis may be traced out at once by means of an instrument, described in Prob. xxii. ; for it is of little importance whether…
Scientific recreations
Internet Archive · Wellcome Library · Public domain (published before 1931). Free to use for anything.