Let m, n be two distinct lines such that
m ∩ n = {O}. Which of the postulates below
would you use to prove that all the points in the
plane containing the lines m and n but not on the
lines are divided into four convex disjoint sets?
(A) Angle Construction Postulate
(B) Plane Separation Postulate
(C) Ruler Placement Postulate
(D) None of the above
Key
(B)