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Question

In the given figure, AB = AC and OB = OC. Then, ∠ABO : ∠ACO = ?
(a) 1 : 1
(b) 2 : 1
(c) 1 : 2
(d) None of these

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Solution

(a) 1:1

​In OAB and OAC, we have:
AB=AC (Given)OB=OC (Given) OA =OA (Common side)
Thus, OABOAC (SSS criterion)
i.e., ABO=ACO
ABO : ACO=1 : 1

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