Answer :

=140°,=40°, = 140°, BOD = 40°


Given lines AB and Cd intersect at a point O and + =280°


= (Opposite angle)


+ = 280°


+ = 280°


2 = 280°


= 140°


= = 140°


Now,


+ = 180° (Because AOB is a straight line)


+ 140° = 180°


= 40°


= BOD = 40°


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