History of Hindu Mathematics: A Source Book v2.c17.s19.1
History of Hindu Mathematics: A Source Book v2.c17.s19.1
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v2.c17.s19.1
**Rational Isosceles Trapeziums.** Brahmagupta has shown how to obtain an isosceles trapezium whose sides, diagonals, altitude, segments and area are all rational numbers. He says :