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  4. If E is the set of equilateral triangles and I is the set of isosceles triangles, then find I-E.

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Q. If $E$ is the set of equilateral triangles and $I$ is the set of isosceles triangles, then find $I-E$.

Sets

Solution:

(i) Recall the properties of triangles.
(ii) Every equilateral triangle is an isosceles.