In other words, what is the area of a circle? The formula is
Ï€r2
pronounced 'pi r squared', and means the constant pi, which is multiplied by the radius squared. In your case, with 6 inch radius, the answer would be
πr2 = π62= 36π in2. Taking π = 22 / 7, we can say that: 36π in2= 113.14 in2.
The above math is wrong. You need to use the Radius of the six inch circle which is 3 inches, as well, 22/7 is a very rough estimate of PI as well, only good to 2 decimals.
pi*r2 in this case is pi*32=28.27in2 or 182.39cm2
Area of a 12-inch circle: 113.1 square inches.Area of a 16-inch circle: 201.1 square inches.
A 72-inch diameter circle has an area of: 28.3 square feet.
A 32-inch circle has an area of 804 square inches.
A 4-inch diameter circle has an area of 12.566 square inches.
The area of an 11-inch diameter circle is: 95.03 square inches.
A 6-inch circle has an area of: 28.27 square inches.
Area of a circle = pi*radius squared
28.274 square inches.
Area = pi*6*6 square inches
I believe 8 feet 6 inch radius and 8 feet 6 inch is 8.5 feet Area of circle is pi x radius x radius = pi x 8.5 x 8.5 = 226.98 square feet
Area of a 12-inch circle: 113.1 square inches.Area of a 16-inch circle: 201.1 square inches.
Area of the circle: pi*6 squared = 36*pi square inches
If you are talking about 9 and 12 inch diameter, then divide both by 2 to get the radius. The area of a circle is pi (3.1415 is good for most calculations) multiplied by the square of the radius. So for the 12 inch circle, the radius is 6. The square of the radius is 36, and multiplying this by pi gives approximately 113.1 square inches. Now the 9 inch circle has a radius of 9/2 or 4.5. Squaring this we get 20.25, which multiplied by pi is approximately 63.6 square inches. If 9 and 12 were already the radius in the problem, just don't divide by 2 since you already have the radius.
There are 100*pi square inches in a 20 inch diameter circle
Area of circle: pi*6 squared = 36*pi square inches
The area of a circle with an 8 inch diameter is approximately 50.27 square inches.
The circumference of a 6-inch circle is: 18.85 inches.