STEP 1:
Find the radius.
Area=πr^2
plug in the known numbers
452.39= (3.14)r^2
divide both sides by 3.14
452.39 ÷ 3.14= r^2
144.07= r^2
take the square root of 144.07 and r^2
12 feet= r
STEP 2:
multiply radius by 2 to equal diameter
Diameter= Radius * 2
Diameter= 12 feet * 2
Diameter= 24 feet
ANSWER: The diameter would be 24 feet.
Hope this helps! :)