Home | Theorems | Brahmagupta's Theorem | Corollary | Area Formula | Area Formula Extension

If any quadrilateral ABCD has sides of lengths a, b, c, and d, and the semi-perimeter , then the area is given by:

Brahmagupta (598–668) was an Indian mathematician and astronomer who discovered a neat formula for the area of a cyclic quadrilateral.

Last updated: April 20, 2007