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Grade 3 · MD

Perimeter of Polygons

Find the perimeter of a polygon by adding its side lengths.

Grade 3Common Core 3.MD.D.8MDVerified correct ✓

Worked examples

Find the perimeter of a rectangle with length 9 and width 1.
Answer: 20
Find the perimeter of a rectangle with length 12 and width 9.
Answer: 42

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