# <span lang="EN-US

=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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