Mary’s trapezoid-shaped garden has a perimeter of 24 yd. She knows the length of three of the sides, 3 yd, 6 yd, and 9 yd.(1 point)
What is the length of the fourth side?
To find the length of the fourth side, we subtract the sum of the lengths of the three known sides from the perimeter.
Perimeter of the trapezoid = 24 yd
Sum of the lengths of the three known sides = 3 yd + 6 yd + 9 yd = 18 yd
Length of the fourth side = Perimeter - Sum of the lengths of the three known sides = 24 yd - 18 yd = <<24-18=6>>6 yd. Answer: \boxed{6}.