Class 11th Maths Textbook Chapter 1: Sets Exercise 3: Subsets and Universal Set Question 7 (ii) Solution

Question

What universal set(s) would you propose for each of the following? (ii) The set of isosceles triangles

Accepted Answer

Identify one or more universal sets that contain all isosceles{math_tip:def_isosceles_triangle} triangles.
 {green}	extbf{Possible Answers: (a). The set of all triangles, (b). The set of all polygons.}|||	extbf{Reason: Every isosceles triangle is a triangle as well as a polygon. Therefore, the set of all triangles and the set of all polygons contain all isosceles triangles and can serve as universal sets. This shows that a universal set is not unique.}{/green}

Question: 7 (ii)

Answer