184 ANITAS RASANGRAHA CHAPTER VII. CALCULATION RELATING TO THIE MEASUREMENT OF AREAS. 1. For the accomplishment of the object held in view, I bow again and again with truc earnestness to the most excellent Siddhas who have realized the knowledge of all things. Hereafter we shall expound the sixth variety of calculation forming the subject known by the nam of the Measurement of Ares. And that is as follows:-- 2. (The measurement of) area has been taken to be of two kinds by Jina in accordance with (the nature of), the result, namely, that which is (approximate) for practical purposes and that which is minutely accurate. Taking this into consideration, I shall clearly explain this subject. 3. (Mathematical) teachers, who have reached the other shore of the ocean of calculation, have given out well (the various kinds of) areas as consisting of those that are trilateral, quadrilateral and curvi-linear, being differentiated into their respective varieties. 4. A trilateral area is differentiated in three ways; a quadri- lateral one in five ways; and a curvi-lincar one iu eigh tways. All the remaining (kinds ot) areas are indeed variations of the varieties of these (different kinds of arcas) 5. Learned men say that the trilateral area may be equilateral, isosceles or scalene, and that the quadrilateral area also may be 1 5 and 6 The various kinds of enclosed areas inentioned in these stanzas are illustrated below --- Samatribhuja Equilateral trilateral figure. 2 Dvisaruatribhuja = Visamatiibhuja = Sealene trilateral hguie. Isoscoles tuilateral figure
