If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

To log in and use all the features of Khan Academy, please enable JavaScript in your browser.

Main content

Unit: Perimeter

Not feeling ready for this? Check out Get ready for 3rd grade.

0

Possible mastery points

Perimeter

Learn

Practice

Find perimeter by counting unitsGet 3 of 4 questions to level up!
Find perimeter when given side lengthsGet 5 of 7 questions to level up!

Perimeter of polygons with missing side lengths

Learn

No videos or articles available in this lesson

Practice

Find a missing side length when given perimeterGet 3 of 4 questions to level up!
Find perimeter when a side length is missingGet 3 of 4 questions to level up!

Perimeter word problems

Learn

Practice

Perimeter word problemsGet 3 of 4 questions to level up!

Quiz 1

Level up on the above skills and collect up to 400 Mastery points

Comparing area and perimeter

Learn

Practice

Area and perimeter situationsGet 3 of 4 questions to level up!
Compare area and perimeterGet 3 of 4 questions to level up!
Area and perimeter word problemsGet 3 of 4 questions to level up!

Quiz 2

Level up on the above skills and collect up to 240 Mastery points

Up next for you:

Unit test

Level up on all the skills in this unit and collect up to 800 Mastery points!

About this unit

Get ready to draw the line--the perimeter line, that is! This unit will walk you through everything you need to know about measuring the distance around shapes and finding out how big (or small) they really are. Who knew math could be so much fun?