Question

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Answer 1

Answer:

see

as

(angleBAO=angleDCO=angle CDO (an..=angle)

and OC=OD AND ) is given

NOW

as we know that

an..DCO +an..CDO+an..COD =180

AND an..COD =180-(an..DOC+an..CDO).......equation 1

Now

AD and BC ARE straight line

so an..COD =an..AOB

so an..AOB=angleDCO=angle CDO

NOW

AS WE KNOW THAT

AOB=180-(an..DOC+an..CDO)

and an..BAO=angleDCO=angle CDO

SO AO=BO

AND AN..BAO=AN..ABO

AND AB//DC ( HENCE PROVED)

NOW I THINK THAT NOW YOU HAVE UNDERSTOOD

SO PLEASE MARK ME AS BRAINLIEST