NCERT Class XI Mathematics - Sets - Solutions

Question : 20

Total: 73

What universal set(s) would you propose for each of the following:
(i) The set of right triangles.
(ii) The set of isosceles triangles.

Solution:

(i) Right triangle is a type of triangle. So the set of triangles contain all types of triangles.
∴ U = {x : x is a triangle in a plane}
(ii) Isosceles triangle is a type of triangle. So the set of triangles contain all types of triangles. ∴ U = {x : x is a triangle in a plane}

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