Question

State and prove cyclic quadrilateral theorem 

Answer 1

Answer:

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.

Hope you if you find this answer helpful. ... Please mark my answer Brainliest if you find it helpful.