d * pi
or 2 * r * pi
Where d is diameter and r is radius and pi = 3.14159
Divide the circumference by 2*pi because 2*pi*radius = circumference
The way to find the circumference is either 2 x pi x r, or pi x d.So rearrange the formula:circumference = 2 x pi x rcircumference / 2 x pi = rSo take the circumference, and divide it by 2 pi and you have the radius.A:Using the formula for circumference which is 2(pi)r solve for r. Now you have radius = circumference/(2pi). The formula for area of a circle is (pi)r^2. Substituting r with circumference/(2pi) you get area = pi(circumference/(2pi))^2. When you simplify you get area = circumference^2/(4pi).
Circumference = 2 x {pi} x radius = {pi} x diameter
Circumference of a circle:Formula= diameter * pi (approx 3.14)
the formula for pi is the ratio of the circumference of a circle to the diameter of the circle
pi = circumference/diameter circumference = pi*diameter or 2*pi*radius
Because:- circumference/diameter = pi and when the formula is rearranged circumference = pi*diameter
To express a quantity in terms of pi, you need to relate it to a circular measurement, such as the circumference or area of a circle. For example, if you have the circumference of a circle, you can use the formula ( C = 2\pi r ), where ( r ) is the radius, to express the circumference as a multiple of pi. Similarly, for the area, use ( A = \pi r^2 ) to express the area in terms of pi. Simply factor out pi from the equation to achieve the desired expression.
Circumference of a circle = 2*pi*radius or pi*diameter
The area ( A ) of a circle can be expressed in terms of pi (( \pi )) using the formula ( A = \pi r^2 ), where ( r ) is the radius of the circle. The circumference ( C ) of a circle is given by the formula ( C = 2\pi r ). Both formulas highlight the fundamental role of ( \pi ) in relating the dimensions of a circle to its geometric properties.
circumference = 2*pi*100
circumference in m= 5*pi
When you are given the circumference of a circle asked to find the diameter, divide the circumference by pi. The formula for circumference is pi x diameter, so the formula for diameter is circumference divided by pi. So 7 divided by pi equals about 2.22.
The formula for the area of a circle is pi * radius squared. The circumference of a circle's formula is pi * diameter. NOTE: pi equals approx. 3.14
By using the well-known formula, A = pi x r2, and expressing the radius in terms of the circumference, r = c / (2 x pi). Replace in the first formula, and simplify. f
The formula for the circumference of a circle is C = pi r2 where r is the radius. Substituting 56 inches for the radius gives: C = pi(56)2 = (3136)pi inches.
circumference of a circle = 2*pi*radius or pi*diameter