In the given figure, ABCD is a quadrilateral and ∠ADC=a∘,∠BCD=b∘. AO and BO are bisectors of ∠DAB and ∠ABC respectively meeting at O. Find ∠AOB in terms of a∘ and b∘.
In a quadrilateral ABCD, AO and BO are bisectors of angle A and angle B respectively.
Show that :
In a quadrilateral ABCD,AO and BO are the bisectors of ∠A and ∠B respectively, ∠C=70∘ and ∠D=30∘. Then, ∠AOB= ?