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Area of a circle = πr2, where π is the symbol for pi and is 3.14159... , and r is the radius. If you are using a scientific calculator, you will probably have a key for π. Once you have the radius, it's just a matter of correctly entering it into your calculator according to the formula. The unit for area is squared, for example 32in2 or 59m2.
Area of a circle equals 3.14r^2.
So multiply the radius times itself. Then times pi.
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How do you find the radius of a circle if you only know the area?
Radius = +sqrt(Area/pi)
How do you find the radius of a circle if you already know the area?
The area of a circle equals pi times the radius squared (A = pi*radius2) where pi is 3.1416 So the radius is the square root of the area divided by 3.1416
How do you find the diameter of a circle when you know the area?
Divide the area by pi. (3.14 or 22/7) Find the square root of your answer. This will be the radius. Multiply the raduis by 2.
How do you find the radius and diameter of a circle if you know the area?
The area of a circle is found by multiplying pi time the radius squared A = (pi) r2 So to find the radius, divide the area by pi and then take the square root to get the radius. The diameter is always exactly twice the radius. --- Example: Area = 100 A = (pi) r2 100 = (3.1416) r2 r2 is 100/3.1416 or about 31.83, and the square root is 5.64 r = 5.64 and D = 11.28
How do you find the diameter if you have the area of a circle?
Since the area of a circle is (Pi)times(Radius squared) then you would reverse the process to find the radius, and hence, the diameter. Divide the area by Pi (3.14159...) and you would have the radius squared. Take the square root of that and you have the radius. To get the diameter, multiply the radius by 2.
How do you find the radius of a circle if you only know the area?
Radius = +sqrt(Area/pi)
How do you find the radius if you know the area of a circle?
Radius is the square root of (area divided by pi).
How do you find the radius of a circle if you don't have the area?
If you do not have the area, what do you have? The radius is half the diamiter The radius is PieR2 Worked backwards if you know the circumfrence.
How do you find the radius and diameter of the circle if you know the area?
Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)
When you know the radius of a circle how can you find the area?
Area of a circle = pi*radius2
Beneficial to know the area of a shape?
well it is benificial to know the area of a shape because to find the circumference, radius, and diameter u must know the area of the shape well it is benificial to know the area of a shape because to find the circumference, radius, and diameter u must know the area of the shape
How do you find the circumference of a circle when you know the area?
To find the circumference of a circle when you know the area, you first need to find the radius of the circle using the formula for the area (area = πr^2). Once you have the radius, you can calculate the circumference using the formula for the circumference (circumference = 2πr).
How do you find the area of a circle to the nearest hundredth?
If you have the radius, then area = pi*r2 which you then round to the nearest hundredth. If you do not know the radius but do know the diameter or circumference, you can calculate the radius. Otherwise you need to measure it.
How can you find the area if you know the radius?
Area=πr2 π≈3.14 (π is pi)
How do you find the radius of the base in a cylinder?
It depends on the values you have. The base of a cylinder is a circle. If you know the circle's diameter, half it to find the radius. If you know the circle's circumference, divide by 2pi to find the radius. If you know the circle's area, divide by pi and take the square root to find the radius.
How do you find the radius if you do not know the diameter?
You can measure it. Otherwise, you certainly have to know SOMETHING about the circle to calculate the radius, usually the diameter, the circumference, or the area. If you don't know anything at all about a circle, you can't find out the radius, either.
How do you find the radius when you only have area of a circle?
Use the formula area = pi x radius2. If you replace everything you know, you can solve for the radius.
