Question

{x:x is a equilateral triangle in a plane } c or ¢ {x:x is a trianle in the same plane}​

Answer 1

Answer:

we know, A set is known as subset of another set if all elements of the set are elements of the set. for example :- set A = {a, e, i} and set B = {a, b, c , d , e , f , g , h , i} are given then, we can say set A is subset of set B, because all elements of set A are elements of set B. hence, we can write it .

we know, equilateral triangle is a type of triangle . so, the set of equilateral triangles in a plane is subset of the set of any triangles in a plane.

so, {x : x is an equilateral triangle in a plane}  {x : x is a triangle in the same plane}