Area & perimeter word problem: dog pen (Full video)

Khan Academy

Supporting grades: 3

Description: Sal figures out the width of a dog pen. Created by Sal Khan. Mike built a rectangular dog pen that is 21 feet long and has a perimeter of 78 feet. What is the width of Mike's dog pen? So let's draw what it might look like.

You must log inorsign upif you want to:*

*Teacher Advisor is 100% free.