Answer:
a:
13ft.
b:
61ft.
c:
228ft.
Explanation:
pythagoras theorem part:
22^2 - 18^2 =160
√160 = 12.649... = 13ft. (rounded )
b:
18 + 18 + 12.649... + 12.649... = 36 + 25.298... = 61.298... = 61ft. (rounded)
c:
12.649... x 18 = 227.683... = 228ft. (rounded)