1.

In a quadrilateral ABCD,AO and BO are the bisectors of ∠A and ∠B respectively, ∠C=70∘ and ∠D=30∘. Then, ∠AOB= ? (a) 40∘ (b) 50∘ (c) 80∘ (d) 100∘

Answer»

In a quadrilateral ABCD,AO and BO are the bisectors of A and B respectively, C=70 and D=30. Then, AOB= ?

(a) 40

(b) 50

(c) 80

(d) 100



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