Care este răspunsul corect?
![Care Este Răspunsul Corect class=](https://ro-static.z-dn.net/files/db3/b6cb5a007aef33e4bc9eb8d06a88e1ac.jpg)
AOB=?
AOB=a
BOC=2a
COD=3a
DOA=4a
AOB+BOC+COD+DOA=360⁰
a+2a+3a+4a=360⁰
10a=360⁰/:10
a=36⁰=AOB