State in each case whether A ⊂ B or A ⊄ B. A = {x : x is an isosceles triangle in the plane}, B = {x : x is an equilateral triangle in the same plane}

Question

Philoid · Accepted Answer

A ⊄ B

Explanation: since all isosceles triangles are not equilateral triangles. Therefore set of isosceles triangle is not contained in the set of equilateral triangle.

State in each case whether A ⊂ B or A ⊄ B.A = {x : x is an isosceles triangle in the plane}, B = {x : x is an equilateral triangle in the same plane}

State in each case whether A ⊂ B or A ⊄ B.
A = {x : x is an isosceles triangle in the plane}, B = {x : x is an equilateral triangle in the same plane}