Answer :

(i) 1:1



In AOB and COD


AB = CD


OA = OC = OB = OD


SSS Congruency.


So each and every angles and sides should be equal.


OAB = OCD = OBA = ODC


(ii) Passes through the origin of that Circle.



As you can see in this image The perpendicular bisector passes through the centre.


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