If you want the area of a circle, and you know the diameter, then: A = pi*r^2, where r is the radius, and is 1/2 the diameter, so pi*(diameter/2)^2 = (pi/4)*(diameter)^2. If you want square inches, then make sure you have the diameter measurement in inches, first.
The area of a circle with a diameter of 12 inches is: 113.1 square inches.
The area of a circle that has a diameter of 14 inches is: 153.9 square inches.
The area of a circle with a diameter of 16 inches is: 201.1 square inches.
The area of a circle with a diameter of 75 inches is: 4,418 square inches.
If the area of a circle is about 28 square inches the diameter of the circle is: about 6 inches (5.971).
If the area of a circle is 20 square inches the diameter is: 5.046 inches.
The area of a circle with a diameter of 12 inches is: 113.1 square inches.
If the area of a circle is about 28 square inches the diameter is: about six inches (5.971).
The circle's area is: 28.27 square inches.
The area of a circle with diameter of 16 inches is: 201.1 square inches.
The area of a circle with a diameter of 4 inches is: 12.57 square inches.
The area of a circle with a diameter of 16 inches is: 201.1 square inches.
The area of a circle when the diameter is 30 inches is: 706.9 square inches.
The area of a circle with a diameter of 9 inches is: 63.62 square inches.
The area of the circle if the diameter is 16 inches is: 201.1 square inches.
The area of a circle that has a diameter of 14 inches is: 153.9 square inches.
The area of a circle with a diameter of 16 inches is: 201.1 square inches.