The length of a straight line that travels from one side of a circle to another, while passing through the center of a circle.<ref>Wile, Dr. Jay L. ''Exploring Creation Through General Science''. Anderson: Apologia Educational Ministries, Inc.
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The length of a straight line that travels from one side of a circle to another, while passing through the center of a circle.<ref>Wile, Dr. Jay L. ''Exploring Creation With General Science''. Anderson: Apologia Educational Ministries, Inc.