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[ Cyclic quadrilateral is a quadrilateral such that a circle can be drawn passing through all four of its vertices. OR this may also be defined as a quadrilateral such that all four of its vertices lie on a circle].

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Brhma Gupta formula is for calculating the area of a cyclic quadrilateral. If all the four vertices of quadrilateral are points on a circle, then it is a cyclic quadrilateral.

Rectangle, square are also cyclic quadrilaterals.

If a, b, c and d are sides of a cyclic quadrilateral then,

semi-perimeter is s = (a + b+ c + d ) / 2

This is the generalization of the area of triangle that we are aware of.

Rectangle, square are also cyclic quadrilaterals.

If a, b, c and d are sides of a cyclic quadrilateral then,

semi-perimeter is s = (a + b+ c + d ) / 2

This is the generalization of the area of triangle that we are aware of.