Arithmetic Grade Five

Lesson One hundred and forty-two: Perimeter

Here's another triangle for you to take a look at.

As you can see it has three sides which are 7, 11, and 10 units long. To find the total distance around this object you simply add up the length of each side. 


   PERIMETER = 11 + 10 + 7 = 28 units
Remember units can be inches, feet, yards, meters, or any other unit of length. We use the term units when the actual unit is left unspecified.

Click here to go to next page