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Sagitta, Apothem, and Chord


	If a 55-gallon barrel lying on its side has 8 inches of grain at its deepest point, how much grain does it hold? For this and similar problems, the important keywords have non-intuitive names: sagitta, apothem, circular segment, and chord. This Demonstration illustrates each of these circle-related terms.


	Contributed by: Ed Pegg Jr

Apothem (Wolfram MathWorld)

Chord (Wolfram MathWorld)

Circular Segment (Wolfram MathWorld)

Sagitta (Wolfram MathWorld)

"Sagitta, Apothem, and Chord" from The Wolfram Demonstrations Project
http://demonstrations.wolfram.com/SagittaApothemAndChord/

Contributed by: Ed Pegg Jr

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