A,B,C,D cocyclic prove AC^2=AB×AD+BC^2

[Albert1]

$ABCD$ is a Cyclic quadrilateral,given $BC=CD$

Prove:

$AC^2=AB\times AD+BC^2$

 

[Albert1]

$ABCD$ is a Cyclic quadrilateral,given $BC=CD$

Prove:

$AC^2=AB\times AD+BC^2$

hint:

Spoiler

using the following diagram:
View attachment 6569