ajutor dau coroana .
![Ajutor Dau Coroana class=](https://ro-static.z-dn.net/files/d42/5364e3f2729072705e653c3c033ccbd1.jpg)
Răspuns:
B*OA*=AOB opuse la vârf =>130°
B*OA=A*OB= (360°-260°):2=50°