Question

help me with explaination​

Answer 1

Step-by-step explanation:

If you follow the hint you will be drawing a line EOF parallel to both AB and CD.

So, ABO = BOF = 50° ( interior opposite angles)

In the same way,

CDO = DOF = 40° (interior opposite angles)

So, BOD = BOF + DOF

BOD = 50° + 40°

BOD = 90°