cyclic quadrilateral

In geometry, a cyclic quadrilateral is a quadrilateral whose vertices all lie on a single circle. The vertices are said to be concyclic.In a cyclic quadrilateral, opposite angles are supplementary (their sum is π). Equivalently, each exterior angle is equal to the opposite interior angle.The area of a cyclic quadrilateral is given by Brahmagupta's formula as long as the sides are given. This area is maximal among all quadrilaterals having the same side lengths.
See more at Wikipedia.org...

B: (Matematika) sisiempat siklik
Built to Babylon by Hikmat Gumilar Visit my Website;