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Determining the Perimeter of a Polygon

T.I.P.S.

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Students will calculate the perimeter of a polygon if all the lengths of all the sides are known, or calculate a missing length if the perimeter and other side lengths are given.

Example

Valerie’s family is making part of their yard into a vegetable garden. They plan to put metal edging around the garden to keep the grass in the rest of the yard out of the garden. If the diagram below represents the garden, how many feet of edging will they need to put around the garden?  

37bexample

Hint 

Possible Solution 

Digital Tools

Click on the links below for interactive games.  

Shape Surveyor 

Perimeter Shape Shoot 

Perimeter 

Perimeter with Word Problems 

Find the Missing Side 

Fence Me In! 

Adam Ant

 

Resources

Click on the following links for more information.

TEKS

Readiness Standard 

 3.7 Geometry and measurement. The student applies mathematical process standards to select appropriate units, strategies, and tools to solve problems involving customary and metric measurement. The student is expected to:

(B) determine the perimeter of a polygon or a missing length when given perimeter and remaining side lengths in problems

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