The Shulbasutras of Baudhayana, Apastamba, Katyayana and Manava: With Text, English Translation and Commentary c7.306

c7.306

1.2 A cord of length equal to a given measure is increased by its half so that the whole length is divided into three parts of half the measure each. In the third part on the western side, a mark is given at a point shorter by one-sixth (of the third part). With the two ties fastened to the two ends of the east-west line (*pṛṣṭhyā*) the cord is stretched towards the south by the mark and a pole is fixed on it. The same is done towards the north. The same is repeated on the other side (eastern) after interchanging the ties. Thus are determined (the four corners of the right rectilinear figure). Thereby the sides are shortened or lengthened.