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Published byMargaretMargaret Davidson Modified over 3 years ago

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Perimeter

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Learning Goals 0 LG: Develop and apply a formula for determining the perimeter of polygons 0 Kid Friendly: Be able to find the perimeter of a non curved shape 0 What I think I know:

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Definition 0 Perimeter: the distance around a two-dimensional shape 0 The perimeter of a shape means adding up the length of each side

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For Example

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Why is this an important concept?

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Equations 0 There are specific equations you can use to find certain perimeters 0 If your shape is a REGULAR polygon than you know that all of the sides are the same. That means you could take the length of each side and multiply by the number of sides on the shape 0 If your shape is an IRREGULAR polygon you will need to add the length of every side together

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Specific Equations 0 The equation to find the perimeter of a square is: 0 4 x the length of one side 0 The equation to find the perimeter of a rectangle is: 0 2 x the length + 2 x the width

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Practice 0 Using a ruler, can you find the perimeter of the following things in our classroom in cm? 0 A table 0 A desk 0 A ruler 0 A piece of loose leaf 0 A cubby 0 Items of your choosing

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