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  • Let U be the set of all triangles in a plane. If A is the set of all triangles with at least one angle different from 60 degree , what is A′?

Q. 6 Let U be the set of all triangles in a plane. If A is the set of all triangles with at least one angle different from 60\degree, what is A′?

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A' is the set of all triangles whose angle is 60\degree in other words A' is set of all equilateral triangles.

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Divya Prakash Singh

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