Answer :

Given, ROE = 60

According to given figure, AOE = 120, AOD = 60 and ROD = 120.


In triangle AOE, consider EAR = DEA = x


AOE + EAR + DEA = 180


x + x + 120 = 180


2x + 120 = 180


2x = 60


x = 30, i.e. EAR = 30


In triangle AOD, consider RAD, = EDA = y


RAD + EAR + AOD = 180


y + y + 60 = 180


2y = 120


y = 60, i.e.RAD = 60.


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