One definition of pi is the ratio of the circumference, C, of a circle to its diameter.,d. pi=C/d The area of a circle is (pi)r2 or (pi)d2/4 where r is the radius.
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The ratio of the circumference of a circle to its diameter is Pi. (3.14159)
To convert area into circumference, take the two formulas for circles--circumference and area: C=2pi*r A=pi*r^2 Now, isolate the common variable (r) in the second equation. r=sqrt(A/pi) Now you can substitute this in for "r" in the first equation to find circumference C=2pi*sqrt(A/pi) C=2pi*sqrt(36pi/pi) pi cancels out C=2pi*sqrt(36) C=2pi*6 C=12pi
diameter = 12.56/pi
Circumference = 2*pi*r where r is the radius so Radius = Circumference/(2*pi) and then Area = pi*r2 So, circumference = 88 cm implies that area = 616.25 cm2
Circumference of a circle = 2*pi*radius or pi*diameter Area of a circle = pi*radius2