The distance around the whole circle. The equation is piD or 2pir
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We know that C = 2*pi*r, meaning the C/pi = 2r = d. As a result whatever the circumference is divided by pi (3.14159....) is going to be the diameter. For example, if the circumference is 6.28 inches, the diameter will be 2 inches.
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.
The ratio of a circle's circumference to its diameter is a constant but irrational (meaning its precise value cannot be fully written out using traditional numbers) number called Pi (π). Pi ~= 3.1415927 Circumference = Pi (3.1415927...) * Diameter (120 inches) ~= 376.991118 inches ~= 377 inches
Circumference = 2pi*r Circumference = 86pi
circumference = 24.5