The Shulbasutras of Baudhayana, Apastamba, Katyayana and Manava: With Text, English Translation and Commentary c8.t22.6

c8.t22.6

*A*, *B* — holes at the end of a bamboo rod taken equal to the height of a sacrificer with uplifted arms;
*C* — another hole at the middle of *AB*;
*EF* — the east-west line, *AB*;
*O* — the pole corresponding to the hole *C* of *AB*;
*FG*, *EH*— arcs drawn by the end *B* when *A* is fixed once at *E* and then at *F* respectively;
*P* — the point of intersection of the arcs *FG* and *EH*;
*K* — the point reached by the hole *B* when *A* is fixed at *O* and *AB* is laid over *OP*;
*G*, *H* — points fixed by *A* and *B* when *C* is fixed at *K*.
Hence *EFGH* is the required construction of the square.