Radius: 40/2pi = 6.366197724
Area: pi*6.366197724 squared = 127.324 square feet rounded
Chat with our AI personalities
Circumference = Pi x d: 40 = 3.14 x 40 = 125.6 feet
127.324 ft2
The circumference of a 12-foot-diameter circle is 37.7 feet.
In order to even discuss this question, we must assume that the unit of the '40' is the square of the unit of the '4'. -- The radius, diameter, and circumference of the circle with an area of 40 are each 10.794% shorter than the corresponding measurement in the circle with radius = 4 . -- Its area (40) is 20.423% less than the area of the circle with the radius of 4 .
Circumference of any circle = 2*pi*radius or diameter*pi