The circumference of a circle is 2 pi r, where r is the radius, or it is pi d, where d is the diameter.there is no circuference of pi. Circumference refers to the outer edges of circles
C=2(pi)r
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
Diameter = Circumference/pi
Circumference = diameter(pi) so divide the circumference by pi to get the diameter.
Circumference of any circle = 2*pi*radius or pi*diameter
The circumference of a circle = pi*diametre = 2pi*radius
to calculate circumference you find a circles radius or diameter. you do diameter times pi or radius times 2 times pi. the you have circumference!
circumference = 2*pi*radius or pi*diameter
Area=pi times radius squared Circumference=pi times diameter or pi times radius times two
Because of the radius of the circle
The Greek word for perimeter begins with the letter pi, and since circumference and perimeter are the same the letter Pi was used.
Pi (3.141...) is used for circles, and circles only. You use it to find the area and circumfrence.
Divide by pi and then divide by 2
Pi is the number you get after finding the ratio of a circle's radius to its circumference. It's used in formulas to find the circumference and area of circles. The number goes on infinitely, but most people abbreviate the decimal to 3.14.
You need to know diameter of each circle, which are different for each circle; each circle circumference is pi x diameter where pi = 3.14159
Pi X D = Circumference. To find Diamater if you know Circumference, divide Circumference by Pi (3.14).