Summary
Explains perimeter as the distance all the way around a shape, found by adding up the side lengths. Uses fences and rooms as real examples.
Viewer safety
All ages
Gentle animated educational content, safe to show cold; still worth a quick preview to match it to your lesson.
Our rating is a quick teacher-to-teacher guide — preview before showing.
Teaching resources
Discussion questions
Talk about it
Perimeter is the total length around the outside of a shape. Walk around the edge and add every side.
- What does perimeter measure — the inside or the border of a shape?
- How would you find the perimeter of a square with sides of 5?
- Where in real life would you need to know a perimeter?
Quick work-a-long
Vocabulary: perimeter, side, length, around.
Try it: Measure the four sides of your desk or a book. Add them up to find its perimeter.