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प्रश्न
Mark the correct alternative in the following question:
Let T be the set of all triangles in the Euclidean plane, and let a relation R on T be defined as aRb if a is congruent to b for all a, b T. Then, R is ____________ .
विकल्प
reflexive but not symmetric
transitive but not symmetric
equivalence
none of these
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उत्तर
Hence, R is equivalence.
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