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what is the formula of cyclic quadrilateral. The opposite angle of a cyclic quadrilateral is supplementary. The sum of the products of opposite sides of a cyclic quadrilateral is equal to the product of the two diagonals.
In the figure above drag any vertex around the circle. Brahmaguptas formula for area of cyclic quadrilaterals. There are many techniques to prove this theorem but the best method is using arc measures and inscribed angles.
The cyclic quadrilateral is the equality case of another inequality.
Brahmaguptas formula gives the area K of a cyclic quadrilateral whose sides have lengths a b c d as. A b c d. The formula for the area of a cyclic quadrilateral is. Brahmaguptas Theorem Cyclic quadrilateral.