Perimeter of a Polygon Given Side Lengths

What is the perimeter of this polygon? (Find the length of the missing sides first)

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CCSS.3.MD.D.8

What is the perimeter of this polygon?

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CCSS.3.MD.D.8

Given the perimeter, find the missing side-length.

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CCSS.3.MD.D.8

The United States Department of Defence operates out of 'The Pentagon', named after its equilateral polygon shape.

Ivana wants to find the perimeter of The Pentagon by walking along one side. She knows that every step she takes is 0.8 metres. It takes her 350 steps to cover one side-length of The Pentagon. What is the perimeter of the entire building?

• 1750 m

• 1404 m

• 1400 m

• 2188 m

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CCSS.3.MD.D.8

What is the length of the missing side if the perimeter is 44m?

• 12m

• 22m

• 44m

• 2m

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CCSS.3.MD.D.8

• 9 inches

• 11 inches

• 7 inches

• 13 inches

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CCSS.3.MD.D.8

.

• 402

• 356

• 423

• 403

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CCSS.3.MD.D.8

Madi often practices riding her horse in a large wooden pen in the shape of an octagon. One side of the pen is 20 feet. If Madi takes her horse around the perimeter of the pen 6 times, how far will the horse have travelled?

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CCSS.3.MD.D.8

Alessandra has a garden at home that is 4 feet by 9 feet. What is the perimeter of Alessandra's garden?

• 36 feet

• 26 feet

• 21 feet

• 31 feet

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CCSS.4.MD.A.3

Matteo bought a calendar with different types of insects inside. When he bought it, it was plastic-wrapped and in the shape of a square with one side measuring 14 inches. When he hangs it on his wall, the calendar is opened up. What is the perimeter of the opened calendar?

• 56 inches

• 112 inches

• 84 inches

• 98 inches

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CCSS.3.MD.D.8