12
66 = 198
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.
Circumference = Pi X Diameter; Pi (3.141590) x 66 = 207.3 In.
66%
Area of circle: pi*2.75 squared = 23.758 square feet to three decimal places