Реши задание 46, 47, 48

46.
а) \(\angle AOX=30^\circ,\ \angle BOX=50^\circ,\ \angle AOB=20^\circ,\ \angle COB=40^\circ,\ \angle DOX=130^\circ.\)

б) \(\angle AOB.\)

в) \(\angle BOC=\angle COD;\ \angle BOX=\angle DOZ;\ \angle COX=\angle COZ;\ \angle DOX=\angle BOZ.\)

г) \(\angle AOX=30^\circ,\ \angle AOB=20^\circ,\ \angle AOC=60^\circ,\ \angle AOD=100^\circ,\ \angle AOZ=150^\circ.\)

47.
а) \(44^\circ+77^\circ=121^\circ.\)
б) \(12^\circ37' +108^\circ25'=121^\circ02'.\)

48.
\(x+(x-18^\circ)=78^\circ\Rightarrow x=48^\circ.\)
\(\boxed{\angle COB=48^\circ}\)