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Line 1:
Line 1: − Perimeter is the sum of the lengths of a [[Polygon]]'s sides.+
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In plane geometry, the '''perimeter''' of a 2-dimensional object is equal to the length of the object's boundary. For example, the perimeter of a [[polygon]] is the sum of the lengths of its sides. The perimeter of a circle is its [[diameter]] multiplied by [[pi]].
[[Category:Geometry]]
[[Category:Geometry]]