History of Hindu Mathematics: A Source Book v2.c17.s19.2

v2.c17.s19.2

"The diagonals of the rectangle (generated) are the flank sides of an isosceles trapezium; the square of its side is divided by an optional number and then lessened by that optional number and divided by two; (the result) increased by the upright is the base and lessened by it is the face."⁴