Question
Tue July 03, 2012 By: Ragini Sathe
show that the relation R defined in the set A of all polygons are((P, P,,):P, ND P,, have same numbr os sides),is an equivalence relation.what is the set of all elements in A related to the right angle trialngle T with sides 3,4,5?

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Expert Reply
Tue July 03, 2012
Here, we dont know the set A. Infact, we are supposed to find A. You can find it as below:
 

The elements in A related to the right-angled triangle (T) with sides 3, 4, and 5 are those polygons which have 3 sides (since T is a polygon with 3 sides).

Hence, the set of all elements in A related to triangle T is the set of all triangles.

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