Q. 64.2( 103 Votes )

Let U be th

Answer :


Given that,

U = {x: x is a triangle in the plane}


A = {x: x is a triangle with atleast one angle not equal to 60°}


A’ = U - A = {x : x is a triangle with all angles equal to 60°}


A’ = {x: x is set of all equilateral triangle}.


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