Question

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

• A. $\varnothing$
• B. $I$
• C. $E$
• D. $I+E$

Answer 1

Answer: (D)

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