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Area = pi * r2

r = d/2 = 40/2 = 20

Area = 400*pi

= 1,256.636 approximate

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Q: What is the area of a circle with a diameter of 40 inches?
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Related questions

What is the area of the circle if the diameter is 40 inches inches?

The area of the circle is 1,256.6 square inches.


What is diameter of circle with area 40 square inches?

Area of circle =(11/14) * d *d d denotes diameter. For your case answer is 7.1365 inches


What is the circumference of a circle if the diameter is 40 inches?

The circumference of a circle, if the diameter is 40 inches, is about 125.7 inches. (C = d x Pi).


How many square inches in a 40 inch diameter circle?

Area of a circle = πr² (remember that r or radius is exactly half of the diameter) Radius therefore = 40/2 = 20 inches Thus the Area = 3.14159 × 20 squared = 1256.636 square inches


If the diameter of a circle is 40 m then what is the area in terms of pi?

If the diameter of a circle is 40 m then the area (in terms of Pi) is: about 400pi m2


What is the area of a circle with the diameter of 40?

A ≈ 1,256.64


Diameter of circle in inches if the radius is 20 feet.?

40'


What is the area of a circle if the diameter is 40?

Using 3.14 as Pi the area of circle is: 1256.0


What is the area of a circle with a diameter of 80 inches?

A=πr², and r=d/2, so r=40 inches and A = 1600π sq in = 5026.55 sq in


How do you find the diamter of a circle if you know the area?

In order to find the diameter of a circle if you have the area is to rearrange the formula for the area of a circle to put diameter as the unknown, like so: PIE*d = Area of a Circle d = (Area of a Circle) / PIE Therefore if the area of your circle is 40cm, 40/PIE = 12.73cm and that's the diameter.


If a circle has the diameter of 40 in what is the area?

Area of circle: pi*20^2 = 400*pi square units


If a circles radius is 20 inches what is the circumference?

1256 inches ++ Another Answer ++ The formula for finding the Circumference of a circle is C = Pi x D where D is Diameter and Pi is 3.1416. The Radius of a circle is one-half of the Diameter, hence the Diameter of a circle with a 20-inch Radius is 40 inches. Using the formula above, multiply 40 x 3.1416 to find the Circumference: 40 x 3.1416 = 125.664 inches.