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This constant represents the NCAA's maximum short axis length corresponding to the circumference of a football and is defined by relationship between diameter and circumference to to be no greater than approximately 3.382 inches.1
Remember: Circumference=π⋅Diameter=π⋅2⋅b=π⋅2⋅c⇒
bmax=cmax=Circumferencemax2⋅π
Since we can approximate the football with an ellipsoid, the circumference through the plane of the axis1′and"axis"_2' is related to b or c as: C=π⋅(2⋅b)
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