circ = 2 pi r = pi d
The circumference of a circle when the diameter is 30 is: 94.25
The circumference C of any circle is equal to pi*diameter. The diameter is equal to the radius times 2. So, for a circle with radius 48, it has a diameter of 96, and a circumference of 96*3.14=301.44. This of course is using 3.14 as an estimate for pi.
Using the Circumference And Area.
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
Circumference of a circle = 2*pi*radius or diameter*pi
circumference of a circle = pi*diameter or 2*pi*radius
If you know the radiusGiven the radius of a circle, the diameter can be calculated using the formula:The Diameter is Twice the Radius, or D = 2RWhere R is the Radius.If you know the circumferenceIf you know the circumference of a circle, the diameter is found using the formula D= C/πwhere:C is the circumference of the circleπ is Pi, approximately 3.142
Area of a circle = pi*radius squared Circumference of a circle = 2*pi*radius or diameter*pi
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 = √A/π where: A is the area of the circle and π is Pi, approximately 3.142.
Circumference of a circle = 2*pi*radius or pi*diameter
The circumference of a circle is the length around it. The circumference of a circle can be calculated from its diameter using the formula: Circumference of a circle = 2*pi*radius orCircumference of a circle = pi*diameterwhere r is the radius and d is the diameter of the circle, and � (the Greek letter pi) is defined as the ratio of the circumference of the circle to its diameter.(the numerical value of pi is 3.141 592 654 589 793...).d * pior 2 * r * piWhere d is diameter and r is radius and pi = 3.14159
The diameter of a circle can be found without the circumference using the formula d = 2r. This formula requires that you know the radius of the circle which is half of the diameter. To calculate the diameter you need to multiply the radius by 2. For example if the radius of the circle is 4 then the diameter would be 8 (4 x 2 = 8).You can also find the diameter of a circle if you know the circumference. To do this use the formula c = d. By rearranging the equation you can calculate the diameter as d = c/. For example if the circumference of the circle is 12.5 the diameter would be 4 (12.5/ = 4).