perimeter. learning goals 0 lg: develop and apply a formula for determining the perimeter of...

Perimeter

Learning Goals

0LG: Develop and apply a formula for determining the perimeter of polygons

0Kid Friendly: Be able to find the perimeter of a non curved shape

0What I think I know:

Definition

0Perimeter: the distance around a two-dimensional shape

0The perimeter of a shape means adding up the length of each side

For Example

Why is this an important concept?

Equations

0There 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

Specific Equations

0The equation to find the perimeter of a square is:0 4 x the length of one side

0The equation to find the perimeter of a rectangle is:0 2 x the length + 2 x the width

Practice

0Using a ruler, can you find the perimeter of the following things in our classroom in cm?0 A table0 A desk0 A ruler0 A piece of loose leaf0 A cubby0 Items of your choosing