State whether any given set is finite or infinite:

A = Set of all triangles in a plane.

Which of the following are pairs of equal sets?

J = {2, 3} and K = {x : x ϵ Z, (x² + 5x + 6) = 0}

Which of the following are pairs of equivalent sets?

(i) A = {–1, –2, 0} and B = { 1, 2, 3,}

(ii) C = {x : x ϵ N, x < 3} and D ={x : x ϵ W, x < 3}

(iii) E = {a, e, i, o, u} and F = {p, q, r, s, t}

State whether any given set is finite or infinite:

B = Set of all points on the circumference of a circle.

State whether any given set is finite or infinite:

C = set of all lines parallel to the y-axis