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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 ∆ABD and ∆CDB,
BD = DB ...(Common)
∠ABD = ∠CDB = 30° ...(Given)
∠ADB = ∠CBD = 40° ...(Given)
∴ ∆ABD ≅ ∆CDB ...(ASA criterion)
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