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Radius = 1/2 of the diameter = 2 inches

Area of a circle = (pi) x (radius)2 = (pi) x (2)2 = 4 pi = 12.566 square inches (rounded)

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12y ago
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BoB Brown

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1y ago
pi is equal to 3.1415926535897932384626433832795 to 41 places 3.1416 or 3.14159
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Q: What is the area of a 4 inch diameter circle?
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Related questions

What is the area of a 4 inch circle?

A 4-inch diameter circle has an area of 12.566 square inches.


What is the area of a circle with a one inch diameter?

Area = pi * diameter * diameter /4 = 3.14 * 1 *1 /4 = approx = 3/4 of square inch


What is the area of a circle that has a 25 inch diameter?

Calculate the radius, which is simply 1/2 the diameter. Then use the standard formula for the area of a circle. ________________________________________________________________ The circle area = (pi) x diameter / 4 = 3.14 x 25/4 = 19.625 Sq inch


Whats the area of a 9 inch diameter?

If you mean a circle area than A = 63.61725 inch². Area A = pi times diameter² / 4.


What is the area of a circle that has a 10 inch diameter?

The area of a circle is A = pi times diameter² / 4. Given diameter d = 10 inches. Area A = 78.5398 inches².


How many square inches in a 23 inch diameter circle?

A circle with a 23 inch diameter has am area of 415.4756 sq inches (to 4 dp).


How many square inches in a 4 inch diameter?

In a circle with a diameter of 4, there would be approximately 12.56 square inches in the circle.


What is the area of a circle with an 8 inch diameter?

The area of a circle with an 8 inch diameter is: 50.27 square inches. There are: pi*4 squared = 16*pi square inches or about 50 square inches


What is the circumference of a 4 inch circle?

The circumference of a 4-inch diameter circle is: about 12.57 inches. (diameter x pi = circumference).


Can a circle with a 4 inch diameter fit in a 4 inch square why or why not?

Yes, the circle's diameter is not bigger than the square base length.


What is the area of a circle with diameter of 8 inches?

diameter = 8 inches so the radius will = 4 inches area of a circle = pi*radius2 area = 50.26548246 or 50 square inches to the nearest square inch.


What is the area of a circle with a diameter of 4 inches?

The area of a circle with a diameter of 4 inches is: 12.57 square inches.