Given that,

U is the set of all triangles in the plane

A = Set of triangles different form 60°

To find A'

The complement of set A is the set of all elements of U which are not the elements

of A.

A' = U−A

=Set of all equilateral triangles

A' is the set of all equilateral triangles

Answered by Pragya Singh | 11 months agoFind the symmetric difference A Δ B, when A = {1, 2, 3} and B = {3, 4, 5}.