254 GANTA8ARABANG RAHA blue specified variety). The values of the sidos (of this optionally chosen figure) should be multiplied by the resulting quotient (arrived at as mentioned above. Thus, the numerical values of the sides of the figure produced (in the given circle) are deduced. D¢mples in illustration thereof 2224. The diameter of a circular figure is 18. 0 friend, think out well and tell me tho (various measurements relating to the) eight different kinds of figures beginning with the square which are (inscribed) in this (circle). The rule for arriving at the value of tho diameter of the circular figure inscribed within the various (kinds of quadrilatoral and trilateral) figures mentioned before, with the exception of the longish quadrilateral figure, when the accurate measure of the area and the numerioal value of the perimeter are known in relation to (those same) quadrilateral and other figures 223]. The (known) accurate measure of the area of any of the figures other than the longish quadrilateral figure should be divided by a quarter of the numerical value of the perimeter (of that figure). IThe result is pointed out to bo the diameter of the circle inscribed within that figure. Damples in illustration thereof 224. Having drawn the inscribed circle in relation to the lready specified figures beginning with the square, o you who know the secret of calculation, give out now (the value of the diameter of each such inscribed circlo) 228). If a reprosents the sum of the sides, and d the diameter of the inscribed circle, and 4 the area of the quadrilateral or the triangle in which the circle is insoribed, then Henoe the formula given in the rulo is d = 4
