The Shulbasutras of Baudhayana, Apastamba, Katyayana and Manava: With Text, English Translation and Commentary c8.t25.5

c8.t25.5

**12.4-12.6.** The fire-altars in the form of isosceles triangles (*prauga*) are discussed in these *sūtras*. The *prauga* has been likened to the fore part of a cart (*śakaṭa-mukha*). The method of transforming a square (or a rectangle) into an isosceles triangle has been discussed by Baudhāyana (*Bśl.* 1.7). The construction of a fire-altar in the form of an isosceles triangle and the various types of bricks employed are fully discussed in *Bśl.* 14.1-14.8. Baudhāyana advises the use of rectangular *bṛhatī* bricks and their triangular halves and quarters by cutting the *bṛhatīs* diagonally.