You usually just divide, so the answer is 4.07692308
The perimeter would be 30 feet.
Since the rectangle is 10 ft long and 5 ft wide, you have to all sides together
10 + 10 + 5 + 5 = 30
The diameter is 5.72958
(in order to find the diameter use the equation d= C/pi )
Answer:
Yes, because
is equivalent to 
Step-by-step explanation:
and 

Hope this helps!