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←MathGrade 3Measurement

Knowledge atom

Find the perimeter of a polygon given its side lengths

G3.MD.17Grade 3MeasurementSource mission: Perimeter

Adds all side lengths to find the distance around a polygon.

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Standards alignment

3.MD.D.8

Prerequisites

Common misconceptions

  • adds only the two labeled sides of a rectangle

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Adds all side lengths to find the distance around a polygon.

Estimated time: ~5 min

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