Question

please answerrrrrrrrrr​

Answer 1

SHE IS A ANSWER

Step-by-step explanation:

ABCD is a quadrilateral

To prove : ∠AOB=

(∠C+∠D)

AO and BO is bisector of A and B

∠1=∠2∠3=∠4...(1)

∠A+∠B+∠C+∠D=360

(Angle sum property)

(∠A+∠B+∠C+∠D)=180...(2)

In △AOB

∠1+∠3+∠5=

(∠A+∠B+∠C+∠D)

∠1+∠3+∠5=∠1+∠3+

∠AOB 1 upon 2

(∠C+∠D)