Circumference of a circle is 2 x Pi x the radius
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any circles circumference divided by its diameter will equal pi, or 3.14159 approximately
The area of a circle is defined by the equation A = πr^2 where π = pi (3.14...) A = Area r^2 = radius squared So, the radius of a circle squared multiplied by pi equals the area.
Pi X diameter equals circumference.
yes, it is correct perimeter = d * pi pi is the ratio between the perimeter and the diameter
Because all circles are similar.