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The '''diameter''' of a circle is a [[line segment]] which passes through its center and intersects its perimeter (or [[circumference]]) at two opposite points. The length of the circle's diameter is twice its [[radius]] (distance from center to any point on the circle). Often, one simply speaks of "the diameter" while referring to the length of the diameter.
The '''diameter''' of a [[circle]] is a [[line segment]] which passes through its center and intersects its perimeter (or [[circumference]]) at two opposite points. The length of the circle's diameter is twice its [[radius]] (distance from center to any point on the circle). Often, one simply speaks of "the diameter" while referring to the length of the diameter.
[[Pi]] times the diameter is the length of the [[circumference]] of the circle.<ref>Wile, Dr. Jay L. ''Exploring Creation With General Science''. Anderson: Apologia Educational Ministries, Inc.
[[Pi]] times the diameter is the length of the [[circumference]] of the circle.<ref>Wile, Dr. Jay L. ''Exploring Creation With General Science''. Anderson: Apologia Educational Ministries, Inc.