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The formula for the area of a circle is A = PI R squared.
- Pi is about 3.1416
- R is the radius, half the diameter or 18/2 = 9
Using more digits in PI will give slightly different answers such as
3.14159265359 * 9 * 9 = 254.469004941 which still is about the same value.
So the area of an an 8 inch diameter circle (rounded) is about 254.5 square inches
What else can I help you with?
How many square inches in a 1.25 inch circle?
A 1.25-inch diameter circle contains 1.227 square inches.
How many square inches in 4.75 inch diameter circle?
A 4.75-inch diameter circle contains 17.72 square inches.
How many square inches are in a 4 inch circle?
Area of circle in square inches = pi*radius squared
How many square inches in a 7.25 inch circle?
Area of a circle = pi*radius2 inches
How many square feet in 20 inch diameter circle?
A 20-inch diameter circle contains: 314.16 square inches.
How many square inches in a 1.25 inch circle?
A 1.25-inch diameter circle contains 1.227 square inches.
How many square inches are there in a 8 inch circle?
The area of a circle with an 8 inch diameter is approximately 50.27 square inches.
How many square inches in 4.75 inch diameter circle?
A 4.75-inch diameter circle contains 17.72 square inches.
How many square inches are in the area of a 5 inch diameter circle?
19.63 square inches are in the area of a 5-inch diameter circle.
How many square inches are in the area of 3 inch diameter circle?
The area of a 3-inch diameter circle is about 7.068 square inches.
How many square inches are in a 4 inch circle?
Area of circle in square inches = pi*radius squared
How many square inches in a 1.5 inch circle?
Area of circle is pi*radius*radius. hence area of 1.5 inch circle is 7.065 square inches.
How many square inches in a 7.25 inch circle?
Area of a circle = pi*radius2 inches
How many square inch in a 20 inch diameter circle?
There are 100*pi square inches in a 20 inch diameter circle
How many square inches are in the area of a 9.5 inch diameter circle?
70.9 square inches.
How many square inches in a five inch circle?
That would depend on what you mean by "five inch circle".
How many square feet in 20 inch diameter circle?
A 20-inch diameter circle contains: 314.16 square inches.
