2 x pi x r where pi = 3.1416
or
pi x diameter.
To find the perimeter you do pi (3.1415) times the diameter.
Or you can figure by the radius (P=2 π r; i.e. Perimeter = 2 x 3.1415 x radius)
The perimeter of a circle is its circumference. We use these formulas to find the circumference of a circle;
To make it easier to explain:
Area: Pi (3.14) X Radius Squared (r 2) from the center out of the circle
Perimeter: Pi (3.14) X Diameter (d) from one side of the circle to the other
The perimeter of a circle is called Circumference.
Here is the formula for Circumference:
C= pi x d (pi times diameter)
C= 3.14 x ______ (fill in the blank with the diameter of the circle)
C= (your answer)
NOTE: Pi is approximately 3.14 so when you are using pi to multiply, replace it with 3.14
When the diameter is not given in a circle, double the radius to find the length of the diameter.
There is no such thing as the perimeter of a circle. The circumference, however, is 12.4*pi (since the formula is pi*diameter)
The formula to find the perimeter of a cone is not commonly used, as the perimeter is typically associated with two-dimensional shapes like circles and polygons. However, if we consider the base of the cone as a circle, the perimeter would be the circumference of the base circle. The formula for the circumference of a circle is 2πr, where r is the radius of the circle. So, the perimeter of a cone would be 2π times the radius of the base circle.
There are different formulae for the perimeter, area or other aspects of each shape. Furthermore, the formula may well depend on what information is available to you.
The perimeter of a circle
The boundary or perimeter of a circle is its circumference.
to find the perimeter of a circle you simply do this (pi x D )
The perimeter of a circle has the formula 2πr. Therefore the length of a semi circle is πr. But the perimeter of a semi circle also includes the diameter which is 2r. Therefore the perimeter of a semi circle = πr + 2r = r(π + 2)
There is no specific formula for a sector of a circle. There is a formula for its angle (at the centre), its perimeter, its area.
The formula for the circumference of a circle is pi * diameter or (2 radius.)
The perimeter is equal to Pi times the diameter.
There are different formula for: Height, Area, Perimeter, Angle, Length of Median Radius of inscribed circle Perimeter of inscribed circle Area of inscribed circle etc.
The answer will depend on what the formula is for: the perimeter or area of the segment.
Circumference or perimeter = 2*pi*radius or pi*diameter
The formula for the perimeter of a whole circle is 2 π r therefore the perimeter of a half circle will be (2 π r)/2 which is π r n.b. the perimeter of a circle is normally referred to as the circumference...
2*pi*radius = perimeter or circumference of a circle radius = circumference/2*pi
There is no such thing as the perimeter of a circle. The circumference, however, is 12.4*pi (since the formula is pi*diameter)
2*pi*radius or pi*diameter