Question
Make correct statement by filling in the symbols ⊂ or ⊄ in the blank spaces :
(v) x : x is a triangle in a plane}........{x : x is a rectangle in the plane}
Solution
Let A = {x : x is a triangle in a plane}, B = {x : x is a rectangle in the plane }
Since, no triangle is a rectangle.
∴ No member of set A is a member of set B.
Hence, { x : x is a triangle in aplane} 
{ x : is a tectangle in the plane}
