Let be the circumcenter of triangle and let be the circumcenter of triangle Find
hmmm, this is one of the questions from my thingy
be the circumcenter of triangle 
and let 
be the circumcenter of triangle 
Find 
![[asy] size(5cm);pair A,B,C,D;A=(0,0);C=(4,0);B=(3,3.5);D=(6,-2.5);draw(A--B--C--D--A--C);label(](/api/ssl-img-proxy?src=https%3A%2F%2Flatex.artofproblemsolving.com%2F8%2F7%2Fc%2F87c1e674932e84a74515c4198dd11767d25baf18.png)
