Question

please give reply as soon as possible
I will mark as brainlest for the answer which I feel better​

Answer 1

Answer:

ABCD is a quadrilateral

To prove : ∠AOB=21(∠C+∠D)

AO and BO is bisector of A and B

 

∠1=∠2∠3=∠4...(1)

∠A+∠B+∠C+∠D=360

(Angle sum property)

21(∠A+∠B+∠C+∠D)=180...(2)

In △AOB

∠1+∠3+∠5=21(∠A+∠B+∠C+∠D)

∠1+∠3+∠5=∠1+∠3+21(∠C+∠D)

∠AOB=21(∠C+∠D)

Hence,Proved.

PLEASE MARK AS BRILLIANT AND THANKS

Answer 2

Answer:

The user above me who answered it is correct! Just instead of using Numbers , u should mention the name of the angles then u will get marks in exams. Anyways , good luck!