Question 1031929
longest side is 9m
second side is 1.5m shorter than longest side. so length of 2nd side = (9-1.5)m = 7.5m
3rd side is 1/2 of the longest side . so length of 3rd side = 1/2 * 9m = 4.5m
thus, perimeter of the triangle = sum of 3 sides = 9+7.5+4.5 = 21 m