// macro definitions:
#define PI 3.14159265358979323846
#define CIRCUMFERENCE(radius) (2. * (radius) * PI)
// use this as in CIRCUMFERENCE(21.34)
int radius = 2; int output; radius = radius * 2; output = radius * Math.PI; Console.WriteLine(output);
Boundry of circle is called circumference.
A 12-inch diameter circle has a circumference of: 37.7
The circumference is 175.92918860102841 feet.
Step 1. StartStep 2. Input the value of radius R. Step 3. Let PI=3.14. Step 4. Calculate the circumference=2*PI*R. Step 5. Display/Print the circumference. Step 6. Stop
int radius = 2; int output; radius = radius * 2; output = radius * Math.PI; Console.WriteLine(output);
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
A simple formula to calculate the circumference of a circle: so in this case:
Pi can be used to calculate the area of a circle Pi can be used to calculate the circumference of a circle
You use a protractor.
Circumference = diameter*pi
Because the ratio of the circumference to the diameter of every circle is pi. So circumference = pi*diameter.
Doubling the radius will give the diameter and times this by pi will give the circumference of the circle.
We use it to calculate the circumference of a circle.
The circumference and area of a circle, with radius r is: circumference = 2*pi*r and area = pi*r2 Use the first to calculate r and then the second to calculate the area.
The circumference is essentially the perimeter of the circle, or the distance around the circle. To calculate the circumference of a circle, use the formula C = 2 * pi * r. Circumference = two times pi times the radius of the circle.
Pi is the number of times the diameter of a circle will fit into the circumference. Pi is not a circle, and does not have a circumference or area. To calculate a circumference USING pi, the circumference is diameter * pi. To find the area using pi, area = pi * radius * radius