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Q: What is the area of a circle that has a diameter of four feet?

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The area of a circle with a diameter of 4.75 is: 17.72 square units.

As the area of a circle A equals pi times the radius squared, and doubling the diameter means multiplying the radius by four, the area is multiplied by 16 when you double the diameter.

The area is four times as large if the diameter doubles.The area of a circle is A = (pi)r2 or (pi)(diameter/2)2Since d is squared, it increases the area by the square of 2 if the diameter is doubled.Try calculating the area for a diameter of 2m, 4m and 8m to prove this.

no, the area of a circle equals pi times the radius squared or circumference times diameter over four.

if you double the radius (or diameter) , you get four times the area. area of a circle = pi * radius squared

If the radius of a circle is four inches the diameter, circumference and area are:Diameter = 8 inchesCircumference = 25.13 inchesArea = 50.27 square inches

The formula for calculating the area of a circle is 'pi r squared,' where 'r' represents the radius of the circle. A radius of a circle is, of course, half its diameter. Therefore, divide the diameter (24) by 2, then square it, then multiply that figure by pi. Twenty-four divided by two is twelve. Twelve squared is 144. So, multiply 144 by pi and 'Bob's your uncle.'

4 pi feet, 4 x 355/113 = 12 feet 6.8 in

There are four common measurements of a circle, radius, diameter, circumference, and area. Here is how they are related. Diameter is how far across it is at the widest point. Radius is 1/2 of diameter. Diameter X pi = circumference. pi = 3.1416 Area = pir2

It is reduced by a quarter. If you halve the you also halve the diameter The area (A) of a circle is = pi x (radius)squared. If you halve the radius and then square it then to balance the equation the area must be divided by Four.

It is: pi*42 = 50.265 square feet to 3 dp

Normally a four foot circle is four feet in diameter, unless you're talking about four foot in circumference. As a circle is perfectly round. Therefore, it is either 4 ft or 8 feet long, depending on whether you are measuring the radius or the diameter to determine your 4 ft circle. Good luck Terry PS it’s also 4 or 8 feet wide…. I just kill me.

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