Brahmagupta's Formula

This calculator uses a special case of Brahmagupta's Formula for use with cyclic quadrilaterals. A cyclic quadrilateral is a type of quadrilateral whose end points can form a circle. The formula used is:

Area = sqrt[(s-a)(s-b)(s-c)(s-d)]

• a = side length
• b = side length
• c = side length
• d = side length
• s = semiperimeter = (a+b+c+d)/2