Consider the following sets: R = {x | x is the set of rectangles}

P = {x | x is the set of parallelograms}

T = {x | x is the set of triangles}

I = {x | x is the set of isosceles triangles}

E = {x | x is the set of equilateral triangles}

S = {x | x is the set of scalene triangles}

Which statements are correct? Check all that apply.