If you know the radius (say it's 4), square the radius and multiply that number by pi. So for a radius of four, it would be 4 X 4 = 16 X 3.14 = 50.24, the area of the circle.
You cannot.
To find the area of a circle knowing only the circumference, you can use the formula A = (C^2) / (4π), where A is the area and C is the circumference. Square the circumference, then divide it by 4π to get the area.
You must have another parameter
Area = pi*radius2 So, radius = sqrt(area/pi)
Since the area of a circle is pi times radius squared, take the radius and square it. Then, multiply that by 3.14, or pi to get the area of the circle.
The surface area of every sphere is (4 pi) times (the radius squared).Knowing that, you can find the surface area of not only the one you'reasking about right now, but of every sphere that ever was, is, or will be !
If you know the radius (say it's 4), square the radius and multiply that number by pi. So for a radius of four, it would be 4 X 4 = 16 X 3.14 = 50.24, the area of the circle.
Radius = Circumference/(2*pi)
You cannot.
To find the area of a circle knowing only the circumference, you can use the formula A = (C^2) / (4π), where A is the area and C is the circumference. Square the circumference, then divide it by 4π to get the area.
Radius = +sqrt(Area/pi)
You must have another parameter
The radius is half the diameter, so just divide the diameter by 2.
Area = pi*radius2 So, radius = sqrt(area/pi)
A square doesent have a radius only circles do. :)
use algebra to find the radius, then plug the height and radius into the surface area equation