## Answer

###### Wiki User

###### 04/27/2013

Circumference = pi x diameter = pi x 2 x Radius (By definition - Step 1)

So Radius = (Circumference)/(pi x 2), (find Radius - Step 2)

Area = pi x Radius x Radius, (substitute value or radius obtained in step 2)

## Related Questions

###### Asked in Math and Arithmetic, Algebra, Geometry

### How do you find the diameter of a circle in the terms of pi?

To find the diameter of a circle, you will either need to know
the area or its circumference.
If you know the area:
diameter = 2 x squareroot(area / Pi)
If you know the circumference
diameter = circumference / Pi
...

Read More

###### Asked in Math and Arithmetic, Algebra, Geometry

### How do you fund the circumference of circle when you know the area?

You dived the area by the circumference of the circle.

Read More

###### Asked in Geometry

### How do you find the area of a circle if you only know its circumference?

Divide its circumference by 2*pi which will give the radius of
the circle.
Area of the circle then is pi*radius squared
...

Read More

###### Asked in Math and Arithmetic, Units of Measure, Geometry

### How do you find the circumference of a circle when you know the area?

If you know the area, you can find the radius --> A = (pi) *
r^2
If you have the radius, you can find the circumference --> C
= (pi) * 2 * r
...

Read More

###### Asked in Geometry

### When you know the circumference of a circle how do you find the diameter?

If you know the circumference of a circle, you can find the
radius by dividing the circumference by the value of Pi
(3.14159...)
...

Read More

###### Asked in Math and Arithmetic, Algebra, Geometry

### How do you find the area of a circle if the circumference is 10?

We know that the area of a circle is pi * r2. We also know that
the circumference of a circle is pi * d.
Therefore, when you know the circumference of a circle and want
to know the area, divide the circumference by pi to give you the
diameter of the circle, divide the diameter by 2 to give you the
radius, square the radius and then multiply by pi to get the
area.
So, 10/pi = 3.183.
3.183/2 = 1.5915.
1.59152 =...

Read More

###### Asked in Geometry, Math and Arithmetic, Units of Measure

### How do you find the circumference of a circle without knowing the area?

To find the circumference of a circle, you need only know the
radius or diameter of the circle.
The circumference of a circle is calculated as
2 x Pi x radius
OR
Pi x diameter.
Pi is approximately 3.1415926.
...

Read More

###### Asked in Math and Arithmetic, Geometry

### How do you find the diameter of a circle if you know the circumference?

Divide the known circumference by pi to find the diameter of the
circle.

Read More

###### Asked in Math and Arithmetic, Geometry

### How do you convert area of circle if you know the circumference?

It depends on what you want to convert the area of the circle
into.

Read More

###### Asked in Geometry

### How do you calculate the area of a circle if you know the circumference?

By dividing its circumference by 2*pi will give the radius of the circle and its area = pi*radius2...

Read More

###### Asked in Geometry

### How do you find the area of a circle when you already know the circumference?

radius = circumference/(2*pi)
area = pi*radius2
So Area in terms of Circumference is A = pi [C/2pi]2
or (circumference)2/4 pi
...

Read More

###### Asked in Math and Arithmetic, Algebra, Geometry

### How do you find the radius of a circle?

If you have the circumference- You have to divide the
circumference by 2*Pi
If you know the diameter the radius is simply half the
diameter.
If you know the area of a circle, the radius can be found using
the formula : R = âˆšA/Ï€
where: A is the area of the circle and Ï€ is Pi, approximately
3.142.
...

Read More

###### Asked in Math and Arithmetic, Algebra, Geometry

### How do you find the circumference of a circle of you know the area?

Divide the area by pi, which gives you the square of the radius.
Take the square root and multiply by 2 pi and you have the
circumference.
...

Read More

###### Asked in Geometry

### How do you find the perimeter if you already know the circumference of a circle?

The circumference of a circle is the length of the circle's
perimeter.

Read More

###### Asked in Math and Arithmetic, Algebra, Geometry

### How do you find the circumference if you a have the area?

You can find the circumference of a circle if you know its area
by using the formulas for area and circumference. First, use the
formula for area: A = pi r2. Replace A with the number for the
area. Solve the formula for r, the radius of the circle, dividing A
by pi and taking the square root of the answer. Once you have the
number for r, the radius of the circle, plug that value in place of
r in...

Read More

###### Asked in Geometry

### How do you find the diameter of a circle when you know the circumference?

circumference/pi = diameter

Read More

###### Asked in Math and Arithmetic, Geometry

### How do you calculate the area of a curcumfrence?

There's no such thing as the "area of a circumference", no
matter how you spell it.
A circumference is a length, representing the distance around a
circle, and doesn't
have an area.
If you know the circumference of a circle, and you call it 'C',
then the area of the circle is
C2 / (4 pi)
...

Read More

###### Asked in Math and Arithmetic, Algebra, Geometry

### What formula do you use if you know the diameter of a circle and want to find the circumference?

circumference of a circle = pi * diameter.

Read More

###### Asked in Geometry

### How do you get diameter if you know circumference?

To find the diameter of a circle divide its circumference by
pi

Read More

###### Asked in Algebra, Geometry

### In a circle the circumference and diameter vary directly Which of the following equations would allow you to find the diameter of a circle with a circumference of 154 if you know that in a second ci?

In a circle, the circumference and diameter vary directly. Which
of the following equations would allow you to find the diameter of
a circle with a circumference of 154 if you know that in a second
circle the diameter is 14 when the circumference is 44?
...

Read More

###### Asked in Math and Arithmetic, Algebra, Geometry

### How do you find the area of a circle if you already know the circumfrence?

We know that 2Ï€r=circumference (or Ï€xdiameter)
So simply re-arrange the equation to get r=circumference/2Ï€
Now that you have r, Ï€r^2=area
...

Read More

###### Asked in Math and Arithmetic, Algebra, Geometry

### How is Pi related to the area of a circle?

Pi is related to the area of a circle because it just is. It is
closely related to it in math, and to find the circumference (PI
3.14), you must know the area or the diameter.
...

Read More

###### Asked in Math and Arithmetic, Algebra, Geometry

### What do you know about all the diameters of a circle?

The diameter of a circle is directly proportionate to the
circumference.
You can find the diameter of a circle by dividing the
circumference by the value of Pi (3.14) OR you can find the
circumference by multiplying Pi by the diameter.
it is a line that halves a circle
...

Read More

###### Asked in Math and Arithmetic, Statistics, Education, Geometry

### If you know the circumference of a circle which steps can you follow to find its diameter?

Diameter = circumference/pi

Read More

###### Asked in Math and Arithmetic, Geometry

### How do you find the are of a circle with only the circumference?

It's important to know the formulas for all these
characteristics of circles, and to recognize what they have in
common.
Area of a circle = Ï€r2
Circumference of a circle = 2Ï€r or dÏ€
Where in the above equations r represents radius, and d is
diameter (2r).
Both these equations have r in them. Find the radius using the
circumference equation, and then plug it into the equation for
Area
...

Read More