Question

In the given figure, two straight lines AB and CD intersect at a point O and ∠AOC = 50°. Then ∠BOD =?

(a) 40^o (b) 50^o (c) 130^o (d) 60^o

Answer 1

(c) 130^o

Because,

= ∠AOC + ∠BOD = 180^o … [∵ Linear pair]

= 50^o + ∠BOD = 180^o

= ∠BOD = 180 – 50

= ∠BOD = 130^o