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Question
In the given pairs of triangles of figure, applying only ASA congruence criterion, determine which triangles are congruent. Also, write the congruent triangles in symbolic form.
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Solution
In ∆AOD and ∆BOC,
∠AOD = ∠BOC ...(Vertically opposite angles)
OD = OC ...(Given)
∠ADO = ∠BCO ...(Given)
∴ ∆AOD ≅ ∆BOC ...(ASA criterion)
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