Pi ( 3.142 approx.) is the amount of times the diameter of a circle can be measured along the circumference of a circle. We know that Pi multiplied by the diameter of the circle is equal to it circumference. So we write C=PiD This means, as it says above, that a certain number of "Pi's" will be equal to the circumference.
area of a circle = area of a rectangle(parallelogram) formed by the sectors of circle with pi as length and radius as bradth.
The simple answer is that PI is what falls out when you study circles. If I had a circle that is 1 foot in diameter, then the circumference (or perimeter) is PI feet. The numerical value of PI wasn't chosen at random, it was found. As for the area of a circle, the perimeter of any object has a relationship to its area. So, PI again becomes important.
The circumference is ALL the way around the circle, while the radius is only HALF way into the middle of the circle. I'm guessing you meant "What is the relationship between the radius of a circle and its circumference?" Radius is half of the diameter of a circle, circumference is PI times diameter; therefore, the circumference is PI times two times radius.
Area = (pi/4) x (Diameter)2 Diameter = 2 x sqrt(Area/pi)
The distance across a circle through the center is called the diameter. The distance around a circle is called the circumference. Pi is the ratio of the circumference of a circle to the diameter. So,2 radius x Pi = circumferencePi is approximately 3.14159265358979323846...
circumference of of circle / Radius of the circle
The area of a circle is pi times the square of the radius. Pi has no relationship with the area of a polygon.
pi X diameter = circumference of the circle.
Pi is the relationship between the diameter and the circumference of a circle.
pi
pi is approximately 3.14, and is the ratio of any circle's diameter to its circumference.
Circumference of a circle is 2 x Pi x the radius
Area = (Circumference squared)/4 pi Circumference = 2 sqrt(Area times pi)
The circumference and diameter
diameter times pi(3.14159) equals cicumference
area = pi*r2 where pi is the irrational number approximated by 3.14159
Yes because: circumference/diameter = pi and circumference = pi*diameter