Question

theorems of cyclic quadrilateral​

Answer 1

Answer:

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.

Answer 2

Answer:

Theorem 1

In a cyclic quadrilateral, the sum of either pair of opposite angles is supplementary.

Theorem 2  

The ratio between the diagonals and the sides can be defined and is known as Cyclic quadrilateral theorem. If there’s a quadrilateral which is inscribed in a circle, then the product of the diagonals is equal to the sum of the product of its two pairs of opposite sides.