Brahmagupta's formula (area of a cyclic quadrilateral )

Description

In Euclidean geometry, a cyclic quadrilateral or inscribed quadrilateral is a quadrilateral whose vertices all lie on a single circle. This circle is called the circumcircle or circumscribed circle, and the vertices are said to be concyclic.
The area A of a cyclic quadrilateral with sides a, b, c, d is given by Brahmagupta’s formula.

Related formulas

Variables

AArea of the cyclic quadrilateral (m2)
sSemiperimeter of the cyclic quadrilateral (a+b+c+d)/2 (m)
aLength of the side of the cyclic quadrilateral (m)
bLength of the side of the cyclic quadrilateral (m)
cLength of the side of the cyclic quadrilateral (m)
dLength of the side of the cyclic quadrilateral (m)