The Science of the Shulba: A Study in Early Hindu Geometry c10.17
The Science of the Śulba: A Study in Early Hindu Geometry c10.17
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c10.17
Take a cord twice as long as *BC*. Make a tie at each of its ends and a mark at the middle. Fasten the two ties at the poles *B*, *C* and stretch the cord towards the side having taken it by the middle mark. Fix a pole *D* at the point reached by the mark. Join *DA*. It is the required straight line which is at right angles to *BC* at the given point *A*.