5.9 What is the probability of the following events?
(a) The sum of all the angles of a triangle is equal to 180°
(b) Al

5.9 What is the probability of the following events?
(a) The sum of all the angles of a triangle is equal to 180°
(b) All 4 sides of a square are equal
(C) The sum of 2 negative integers is positive
(d) Two parallel lines are intersecting at a point​