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circumference
The circumference is the istance around a closed curve. Circumference is a kind of perimeter.
Trivia about circumference
To find this, multiply the diameter by pi
The diameter of a circle times pi
Term for the boundary of a circle
To determine this for a circle, multiply the diameter by pi
Pi times a circle's diameter gives the measure of this
Third librarian Eratosthenes is famous for determining this measurement of the Earth
For a Major League baseball it's 9 to 9 1/4 inches
Multiply pi times twice the radius of a circle to get this measure
He's the knight who guards the outer boundary of a circle
The length of the closed curve of a circle
Yesterday it chugged the 5-mile diameter of the island: today it's doing this, 15.71 miles
Pi is the ratio of this of a circle to its diameter