Question

in the adjoining figure show that x+y=a+b​

Answer 1

Answer:

add all the angles.

Step-by-step explanation:

add all the angles inside quadrilateral

a+b+(180-x)+(180-y)=360.

solve this

Answer 2

Answer:

I think it's helpful

Step-by-step explanation:

x=a - bcz inverse angle (1)

y=b. -inverse(2)

add (1)and(2)

x+y=a+b