दीर्घचतुरश्रस्याक्ष्णया रज्जु: पार्श्र्वमानी तिर्यग् मानी च यत् पृथग् भूते कुरूतस्तदुभयं करोति ॥
A rope stretched along the length of the diagonal of a rectangle produces an area which the vertical and horizontal sides make together.
This is taken by Baudhayana. This particular idea came to be known later as Pythagorean Theorem.