Question

plz help me in this question plzzz​

Answer 1

given ,

AB = CD

angle ABM = angle CDN

here ,

ABM + ABO = 180⁰ ( linear pair ) --------> ( 1 )

CDN + CDO = 180⁰ ( linear pair ) --------> ( 2 )

therefore ,

( 1 ) , ( 2 ) = ABO = CDO

again ,

angle AOB = angle COD ( vertically opposite angle )

therefore ,

∆ AOB ≡ ∆ COD ( AAS congruency )

proved