circumference is the distance around the circle, so it sounds as though you are stating the circumference in your original question; 66 inches.
Oh, what a happy little question! To find the diameter of a circle when you know the circumference, you can use the formula: diameter = circumference / π. So, for a circle with a circumference of 208 centimeters, the diameter would be 208 / π ≈ 66.12 centimeters. Just remember, there are no mistakes, only happy little accidents in math!
12
66 squared equals 4,356.
If 150 / x = 66, then x = 2.2727 cmSuppose the length is L cm.Then 150*L cm = 66 cmSo L cm = 66 cm/150 = 66/150 cm = 0.44 cm = 4.4 mm.
53
The circumference of a 21-inch circle is: 66 inches.(C = d x Pi).
66 feet
To find the diameter of a circle with a circumference of 66 inches, you can use the formula C = πd, where C is the circumference and d is the diameter. Rearranging the formula to solve for d, you get d = C / π. Plugging in the circumference of 66 inches, the diameter would be 66 / π ≈ 21 inches.
The circumference of a circle with a 21 mile diameter is 66 miles (approx).
132 pi
21 inches
The radius is 10.5
Circumference = 3.14 x diameter Diameter = radius x 2 So...... 3.14 x 132 = 414.48
By a 21-inch circle I presume you mean that the diameter is 21 inches. So the radius is half as long, 10.5 inches. The formula for the circumference of a circle is 2 pi r, where r is the radius. Pi is about 3.14. That is accurate to 2 decimals, or 3 significant digits all together. I use that approximation because the dimension we are given has 2 significant digits. So the circumference is pi times the diameter; we multiply 3.14 by 21 inches and get 65.94. To 2 significant digits, that is 66 inches. If you meant that the radius was 21 inches, then the circumference would be twice as much, or 132 inches.
Well, honey, to find the circumference of a round pool, you use the formula C = πd. Since the diameter of a 24' round pool is 24 feet, you plug that in: C = π(24) = 75.4 feet. So, grab your measuring tape and get ready to walk around that pool about 75 feet to make sure you didn't skip leg day.
Circumference = Pi X Diameter; Pi (3.141590) x 66 = 207.3 In.
Area of circle: pi*2.75 squared = 23.758 square feet to three decimal places