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Circumference of a circle = 2*pi*radius or diameter*pi
The formula for finding the circumference of a circle is c = pi * d (c = circumference, pi = 3.1416, d = diameter. Set up the equation and solve: c = pi * d (next substitute with the known numbers) c = 3.1416 * 29 (next multiply) c = 91.1064
Circumference: 29*pi = 91.106 inches to 3 decimal places
The radius of a circle is double its diameter. It would have a radius of 29/2, or 14.5 yards.
The circumference of a 29-inch pizza is 91.11 inches.