13. Show that the relation R defined in the set A of all polygons as and have same number of sides}, is an equivalence relation. What is the set of all elements in A related to the right angle triangle T with sides 3, 4 and 5?
13. Show that the relation R defined in the set A of all polygons as and have same number of sides}, is an equivalence relation. What is the set of all elements in A related to the right angle triangle T with sides 3, 4 and 5?
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