Answer: The perimeter of a rectangle is found by adding up all four sides. For this rectangle with a base of 9 ft and a height of 10 ft, the two base sides have a length of 9 ft each, and the two height sides have a length of 10 ft each. Therefore, the perimeter is:
P = 2(9 ft) + 2(10 ft) = 18 ft + 20 ft = 38 ft
So the perimeter of the rectangle is 38 feet.
Explanation: