16 times pi is equal to approximately 50.2654824574. Pi is a mathematical constant representing the ratio of a circle's circumference to its diameter, approximately equal to 3.14159. Multiplying 16 by pi gives you the result of 50.2654824574.
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Sixteen times pi. 16*3.1416
It quadruples. The area of a circle is Pi (about 3.14159) times the radius squared. So if you double the radius (say from 2m to 4m), you area will change from 4*Pi to 16*Pi (4 times what it was originally).
The formula where C=circumference, R=radius is C = 2 pi R Since C = 16 pi inches and 16 pi = 2 pi R we can solve for R and get R= 16 pi /2 pi = 8 Therefore the Radius is 8 inches.
Circumference of the circle: 2*pi*8 = 16*pi m
perimeter (circumference): diameter times pi (3.14) area: radius times radius times pi (3.14) Area = pi*radius squared Circumference = 2*pi*radius or pi*diameter