The Shulbasutras of Baudhayana, Apastamba, Katyayana and Manava: With Text, English Translation and Commentary c8.t16.10

c8.t16.10

To make the different types of bricks, the half isosceles triangle on either side is divided into six parts (Fig. 70). *AB*, *BC* and *AC* are divided into three equal parts each by the points, *a*, *b*, *c*, *d*, *e*, and *f*. Join *bc*, *ad*, *de* and *cgf*. The space is thus divided into 3 half isosceles triangles *Bbc*, *cdg* and *dce* which constitute the first type of brick B₁. Note that Bb = 2p, bc = p/2. Through the above division, we get the second type B₂, the rectangular bricks *abcg*, *Aagf* and *fgde*, of which the sides are 2p and p . The third type B₃, called the *bṛhatī*, is a rectangular brick *ABCD* (Fig. 70(b)), of which AB = ⅙p and AD = ¼p. The fourth type B₄ is half *bṛhatī* (Fig. 70(c)), a rectangular brick measuring p/4 by p/6.