Math · Stage 3
Perimeter — the distance all the way around
Walk the edge and add every side: a square is 4 equal sides, a rectangle is two long + two short.
✦ Math📘 Stage 3 · S3⏱ ~10 min🧒 Ages 7–8★ Free to start
I can find the perimeter of a square or rectangle by adding the lengths of all its sides.
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Kavi Fences the Garden 🌱
Kavi is putting a fence all the way around a square garden 🌱. "To know how much fence I need, I walk right around the edge and add every side," hoots Kavi. "The distance around the outside has a special name — the perimeter!"
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What your child will learn
1Every side countsThe perimeter is the distance all the way around the outside edge. To find it you must add every side — so first count how many sides there are. A square has 4 equal sides; a rectangle has 4 sides too — two long and two short. Tap each shape.
2Walk around a squareThis square has sides of 4 cm. Start at 0 and tap Hop +4 once for each side you walk along: 4, 8, 12, 16. Four hops of 4 take you right around.
3Add a rectangle's sides tidilyA rectangle is 6 cm long and 4 cm wide. Add one long + one short side first — that is 6 + 4. Tap Step →.
4Square or rectangle?Both perimeters are just all the sides added — but each shape has a fast way. Tap each card.
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A peek inside
A square has sides of 5 cm. What is its perimeter?
add all 4 sides → 5 + 5 + 5 + 5 → or 4 × 5
Try this at home: A square has sides of 4 cm. Add all 4 sides: 4 + 4 + 4 + 4 = __
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Math · Stage 3 · S3 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.