Area of ANY circle is (pi) x (radius)2 .
2
The area of a circle is equal to pi times the radius squared. A 12 foot radius circle would have an area of exactly 144 pi square feet.
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.
Divide 452.16 by pi and square root the answer which will give a radius of 11.99695787 or about 12 units of linear measurement.
The area of any circle is (pi) x (radius)2 .The area of half the circle is just half of that number.
A 24 foot circle has a radius of 12 feet. The area of a circle is pi times the radius squared. Rounded to two decimal places, that's 452.39 sq. ft.
Area = Pi(r)2 - A circle with a radius of 12 inches has an area of 452.39 square inches.
Equation for the area circle = pi x radius squared If the area is 144pi, then you need to find the square root of 144, which is 12. Therefore, radius = 12
The area of a circle is equal to pi times the radius squared. A 12 foot radius circle would have an area of exactly 144 pi square feet.
A 12-inch circle has an area of 0.784 square feet.
452.39 square units.
Area = Pi(r)2 - A circle with a radius of 12 centimeters has an area of 452.39 square centimeters.
Area of a Circle = (pi)(r^2) Diameter = 2r If the diameter of the circle is 12, then the radius has to be 6. If the area of a circle is pi times the square of the radius, and the square of 6 is 36 (6x6), then the area of the circle is 36pi.
It is the square root of (12/pi) feet
A circle with a radius of 12 units has an area of 452.39 square units.
Area of a circle: pi*radius squared
It is: 72*pi square feet if the radius is 12 feet and not12 square feet
The area of a sector of a circle with radius 12 and arc length 10pi is: 188.5 square units.