Answer:
40.56 ft
Explanation:
The perimeter is the sum of the side lengths. There are two sides of length 10 ft, one side of length 8 ft, and one side that is half the circumference of an 8-ft circle. That side has the length ...
(1/2)C = (1/2)πd = (1/2)(3.14)(8 ft) = 12.56 ft
So, the perimeter is ...
P = 10 ft + 10 ft + 8 ft + 12.56 ft
P = 40.56 ft