Math · Stage 4
Find the perimeter and area of rectangles and composite shapes
Perimeter is the distance around the edge; area is the flat space inside. Split a composite shape into rectangles, then add.
✦ Math📘 Stage 4 · S4⏱ ~12 min🧒 Ages 8–9★ Free to start
I can find the perimeter and area of rectangles and composite shapes.
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Kavi Plans the Garden 🌻
Kavi is planning an L-shaped garden 🌻. "I need two numbers," hoots Kavi. "The fence goes all the way around the edge — that's the perimeter. The grass covers the flat space inside — that's the area. And for a funny L-shape, I just split it into rectangles and add!"
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What your child will learn
1Perimeter around, area insideA shape has two measurements and they are not the same. Tap each card to see its job.
2Perimeter: add a long + a short, then doubleA rectangle is 8 cm long and 5 cm wide. Add one long + one short side first — tap Step →.
3Area: rectangles, and splitting an L-shapeA rectangle's area is length × width (rows × columns of unit squares). For an L-shape, cut it into two rectangles, find each area, then add. Tap each part.
4Composite shape: do each job its own wayFor a composite (L-shaped) garden, perimeter and area need different moves. Tap each card.
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A peek inside
A rectangle is 8 cm long and 5 cm wide. Find its perimeter and its area.
perimeter = 2 × (8 + 5) = 26 cm · area = 8 × 5 = 40 square cm
Try this at home: A rectangle is 7 cm long and 4 cm wide. Perimeter = 2 × (7 + 4) = __ · Area = 7 × 4 = __
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Math · Stage 4 · S4 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.