Cyclic Quadrilateral ?

Revision en1, by genius_noob, 2018-02-08 17:03:00

Can we always form a cyclic quadrilateral using 4 side lengths? I was solving this problem on SPOJ In order to find the maximum area of quadrilateral with side lengths given, I applied Brahmagupta's formula K={\sqrt {(s-a)(s-b)(s-c)(s-d)}}\, and i got AC. I am wondering, is that always possible? Is there any proof?


  Rev. Lang. By When Δ Comment
en1 English genius_noob 2018-02-08 17:03:00 386 Initial revision (published)