Question

please solve it quickly ​

Answer 1

Step-by-step explanation:

In line AB,

<AOD+<DOB=180°. .....(1)

[by linear pair]

<AOD+<AOC=180°. .....(2)

[by linear pair]

from (1) & (2) , we get;

<AOD+<DOB=<AOD+<AOC

<DOB=<AOC

Hence, vertically opposite angles are equal.