Question

prove AOD is vertically opposite to BOC. pls see the figure.

Answer 1

$\boxed{here is your answer!}$

AOD+DOB= 180° (linear pair)..........(i)

DOB+BOC=180° (linear pair)...........(ii)

equating (i) and (ii)

AOD+DOB=DOB+BOC

$\boxed{AOD=BOC}$

$\mathfrak{hence proved}$

hope it helps