thanks so much!

It's correct! Thanks!

Thanks so much, CPhill! It's correct!

0/0 is undefined.

135, break it up

Very nice way hectictar and Alan!

Is it 25?????

Z is the circumcenter of Triangle ABC , so \(\angle YAZ = \angle XAY\) (very useful fact in geometry). Thus also Triangle ZAC=0, then we have \(\triangle ABC \sim \triangle XAC \implies 2 \theta = ?\)

it's 50%...s

its wron.g...

help please

this is aops!!!!!!1