The correct answer is true. A plane formation conditions are: 1) At least three non-collinear points. 2) At least one point and a straight line such that the point should not lie on the straight line. This is the criteria for plane formation
Ht of ceiling = 10 ft which is two-thirds of living rm ceiling Ht of living rm ceiling = 2/3x = 10 ft 2/3h = 10 ft 2/3h times 3/2 to solve for h = 10 times 3/2 h = 30/2 h = 15 ft
