Answer :

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COD = 560


COE = 400


DAC and DOC are supplementary to each other since AD and AC are perpendicular to OD and OC respectively


DAC = (1800-560) = 1240


Since DA = AC so Δ DAC is isosceles


ACD = 280


COE and CBE are supplementary to each other since BC and BE are perpendicular to OC and OE respectively


CBE = (1800-400) = 1400


Since BC = BE so Δ CBE is isosceles


BCE = 200


y-x = ACD- BCE = 80


CDO = OCD = 620 ( ADO and ACO is equal to 900)


Hence OD = OC


OEC = OCE = 700( OCB and OEB is equal to 900)


Hence OE = OC


So combining the above two we can say


OD = OC = OE


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