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Show that the relation R defined in the ...

Show that the relation R defined in the set A of all triangles as `R{(T_(1),T_(2)),T_(1)" is similar to "T_(2)}` is an equivalence relation.
Consider three right angled triangles `T_(1)` with sides 3,4,5, `T_(2)` with sides 7, 24 , 24 and `T_(3)` with sides 12, 16, 20. Which triangles among `T_(1),T_(2)` and `T_(3)` are related ?

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The correct Answer is:
`T_(1)` and `T_(2)`
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